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A list of townlands of Ireland from Newgrange to Oyster Island, together with alternative possibilities for the parish and county in which it is located. See [[:Category:Irish Townlands|Irish Townlands Category]] for further lists of townslands.
{|border="1" cellpadding="4" cellspacing="0" style="border:\#c9c9c9 1px solid; margin: 1em 1em 1em 0; border-collapse: collapse;"
| align="center" style="background:#DDD;"|'''Townland'''
| align="center" style="background:#DDD;"|'''County'''
| align="center" style="background:#DDD;"|'''Parish'''
| align="center" style="background:#DDD;"|'''Remarks'''
|-
| Newgrange||Monknewtown||Meath||
|-
| Newgrove||Glanworth||Cork||
|-
| Newgrove||Killian||Galway||
|-
| Newgrove||Kilreekill||Galway||
|-
| Newgrove||Dysartmoon||Kilkenny||
|-
| Newgrove||Tedavnet||Monaghan||
|-
| Newgrove||Drumraney||Westmeath||
|-
| Newgrove or Ballyslattery||Tulla||Clare||
|-
| Newhaggard||Lusk||Dublin||
|-
| Newhaggard||Garristown||Dublin||
|-
| Newhaggard||Trim||Meath||
|-
| Newhaggard||Kilsharvan||Meath||
|-
| Newhall||Killone||Clare||
|-
| Newhall||Kiltartan||Galway||
|-
| Newhall||Ladytown||Kildare||
|-
| Newhall||Oldconnell||Kildare||
|-
| Newhall||Dunleer||Louth||
|-
| Newhall||Kilcooly||Tipperary||
|-
| Newhall or Gorteenafoly||Ettagh||Offaly||
|-
| Newhill||Ballymoney||Antrim||
|-
| Newhill||Twomileborris||Tipperary||
|-
| Newhouse||Gowran||Kilkenny||
|-
| Newhouse||Tullaherin||Kilkenny||
|-
| Newhouse||Termonfeckin||Louth||
|-
| Newhouse||Kilcowan||Wexford||
|-
| Newhouse||Ballymore||Wexford||
|-
| Newhouses||Kilrane||Wexford||
|-
| Newhouses||St. Helen's||Wexford||
|-
| Newinn T.||Knockgraffon||Tipperary||
|-
| Newland North||Killashee||Kildare||
|-
| Newlands||Glynn||Antrim||
|-
| Newlands||Clondalkin||Dublin||
|-
| Newlands||Burnchurch||Kilkenny||
|-
| Newlands Demesne||Clondalkin||Dublin||
|-
| Newlands Demesne||Tallaght||Dublin||
|-
| Newland South||Killashee||Kildare||
|-
| Newland West||Killashee||Kildare||
|-
| Newlawn||Terryglass||Tipperary||
|-
| Newmarket||Tomfinlough||Clare||
|-
| Newmarket||Clonfert||Cork||
|-
| Newmarket||Aghaviller||Kilkenny||
|-
| Newmarket on Fergus T.||Tomfinlough||Clare||
|-
| Newmarket T.||Clonfert||Cork||
|-
| Newmill||Aughnish||Donegal||
|-
| Neworchard||St. John's||Kilkenny||
|-
| Newpaddocks||Blessington||Wicklow||
|-
| New Park||Antrim||Antrim||
|-
| Newpark||Feenagh||Clare||
|-
| Newpark||Templemaley||Clare||
|-
| Newpark||Ward||Dublin||
|-
| Newpark||Kill||Dublin||
|-
| Newpark||Drumkeeran||Fermanagh||
|-
| Newpark||Kilmeage||Kildare||
|-
| Newpark||Kilmaganny||Kilkenny||
|-
| Newpark||Croagh||Limerick||
|-
| Newpark||Effin||Limerick||
|-
| Newpark||Cashel||Longford||
|-
| Newpark||Kilconduff||Mayo||
|-
| Newpark||Kilmorgan||Sligo||
|-
| Newpark||Ballysheehan||Tipperary||
|-
| Newpark||Kilcooly||Tipperary||
|-
| New Park||Dromore||Tyrone||
|-
| Newpark||Donaghmore||Wicklow||
|-
| Newpark or Loughanavagh||St. Feighin's||Westmeath||
|-
| Newpark Lower||St. Maul's||Kilkenny||
|-
| Newpark Upper||St. Maul's||Kilkenny||
|-
| Newpass Demesne||Rathaspick||Westmeath||
|-
| Newport||Rathreagh||Longford||
|-
| Newport||Burrishoole||Mayo||
|-
| Newport||Kilvellane||Tipperary||
|-
| Newport East||Kilcockan||Waterford||
|-
| Newport T.||Burrishoole||Mayo||
|-
| Newport T.||Kilvellane||Tipperary||
|-
| Newport West||Kilcockan||Waterford||
|-
| Newquay||Oughtmama||Clare||
|-
| Newragh||Louth||Louth||
|-
| Newrath||Dromiskin||Louth||
|-
| Newrath||Louth||Louth||
|-
| Newrath||Kilbeg||Meath||
|-
| Newrath||Slane||Meath||
|-
| Newrath||Kilculliheen||Waterford||
|-
| Newrath||Rathnew||Wicklow||
|-
| Newrath Big||Siddan||Meath||
|-
| Newrath Big||Kells||Meath||
|-
| Newrath Little||Kells||Meath||
|-
| Newross||Kilnarath||Tipperary||
|-
| Newross||St. Mary's||Wexford||Bantry barony
|-
| New Ross T.||St. Mary's||Wexford||
|-
| Newrow||Clonleigh||Donegal||
|-
| Newrow||Raphoe||Donegal||
|-
| Newrow||Kilteel||Kildare||
|-
| Newry||Clogher||Tyrone||
|-
| Newry||Moyacomb||Wicklow||
|-
| Newry T.||Newry||Armagh||
|-
| Newry T.||Newry||Down||
|-
| Newstone||Drumcondra||Meath||
|-
| Newstown||Ardoyne||Carlow||
|-
| Newtate or Drummoan||Killesher||Fermanagh||
|-
| Newtown||Ardclinis||Antrim||
|-
| Newtown||Killevy||Armagh||
|-
| Newtown||Agha||Carlow||
|-
| Newtown||St. Mullin's||Carlow||
|-
| Newtown||Kilmore||Cavan||
|-
| Newtown||Kinawley||Cavan||
|-
| Newtown||Templeport||Cavan||
|-
| Newtown||Denn||Cavan||
|-
| Newtown||Drumcreehy||Clare||
|-
| Newtown||Killuran||Clare||
|-
| Newtown||Kiltenanlea||Clare||
|-
| Newtown||Mallow||Cork||
|-
| Newtown||Ballyhay||Cork||
|-
| Newtown||Doneraile||Cork||
|-
| Newtown||Kilmocomoge||Cork||
|-
| Newtown||Kilbroney||Down||
|-
| Newtown||Balscaddan||Dublin||
|-
| Newtown||Garristown||Dublin||
|-
| Newtown||Westpalstown||Dublin||
|-
| Newtown||Coolock||Dublin||
|-
| Newtown||St. Margaret's||Dublin||
|-
| Newtown||Swords||Dublin||
|-
| Newtown||Kiltiernan||Dublin||
|-
| Newtown||Cruagh||Dublin||
|-
| Newtown||Devenish||Fermanagh||
|-
| Newtown||Ballynakill||Galway||Ballymoe Barony
|-
| Newtown||Killeroran||Galway||
|-
| Newtown||Kilmacduagh||Galway||
|-
| Newtown||Kiltartan||Galway||
|-
| Newtown||Kilmalinoge||Galway||
|-
| Newtown||Moycullen||Galway||
|-
| Newtown||Abbeyknockmoy||Galway||
|-
| Newtown||Cloncurry||Kildare||
|-
| Newtown||Castledermot||Kildare||
|-
| Newtown||Killelan||Kildare||
|-
| Newtown||Kineagh||Kildare||
|-
| Newtown||Rathmore||Kildare||
|-
| Newtown||Tipper||Kildare||
|-
| Newtown||Killashee||Kildare||
|-
| Newtown||Laraghbryan||Kildare||
|-
| Newtown||Leixlip||Kildare||
|-
| Newtown||Kildare||Kildare||
|-
| Newtown||Rathangan||Kildare||
|-
| Newtown||Tully||Kildare||
|-
| Newtown||Ballyshannon||Kildare||
|-
| Newtown||Donaghcumper||Kildare||
|-
| Newtown||Kill||Kildare||
|-
| Newtown||Clomantagh||Kilkenny||
|-
| Newtown||Kilcooly||Kilkenny||
|-
| Newtown||St. Canice||Kilkenny||
|-
| Newtown||Graiguenamanagh||Kilkenny||
|-
| Newtown||St. John's||Kilkenny||
|-
| Newtown||Thomastown||Kilkenny||
|-
| Newtown||Dunkitt||Kilkenny||
|-
| Newtown||Kilmacow||Kilkenny||
|-
| Newtown||Dunnamaggan||Kilkenny||
|-
| Newtown||Mothell||Kilkenny||
|-
| Newtown||Roscomroe||Offaly||
|-
| Newtown||Rahan||Offaly||
|-
| Newtown||Kilcomin||Offaly||
|-
| Newtown||Castlejordan||Offaly||
|-
| Newtown||Lusmagh||Offaly||
|-
| Newtown||Geashill||Offaly||
|-
| Newtown||Kilcumreragh||Offaly||
|-
| Newtown||Kilmanaghan||Offaly||
|-
| Newtown||Caherconlish||Limerick||
|-
| Newtown||Inch St. Lawrence||Limerick||
|-
| Newtown||Kilmurry||Limerick||
|-
| Newtown||Tuoghcluggin||Limerick||
|-
| Newtown||Galbally||Limerick||
|-
| Newtown||Bruff||Limerick||
|-
| Newtown||Kilcornan||Limerick||
|-
| Newtown||Kilkeedy||Limerick||
|-
| Newtown||Hospital||Limerick||
|-
| Newtown||Kilpeacon||Limerick||
|-
| Newtown||Rathreagh||Longford||
|-
| Newtown||Ballymacormick||Longford||
|-
| Newtown||Killashee||Longford||
|-
| Newtown||Louth||Louth||Ardee Barony
|-
| Newtown||Termonfeckin||Louth||
|-
| Newtown||Louth||Louth ||Louth Barony
|-
| Newtown||Ballyovey ||Mayo||
|-
| Newtown||Burriscarra||Mayo||
|-
| Newtown||Kilmore||Mayo||
|-
| Newtown||Kilbelfad||Mayo||
|-
| Newtown||Killallon||Meath||
|-
| Newtown||Loughcrew||Meath||
|-
| Newtown||Colp||Meath||
|-
| Newtown||Duleek||Meath||
|-
| Newtown||Knockcommon||Meath||
|-
| Newtown||Cruicetown||Meath||
|-
| Newtown||Kilmainham||Meath||
|-
| Newtown||Newtown||Meath||
|-
| Newtown||Ratoath||Meath||
|-
| Newtown||Ardcath||Meath||
|-
| Newtown||Newtownclonbun||Meath||
|-
| Newtown||Aghmacart||Laois||
|-
| Newtown||Stradbally||Laois||
|-
| Newtown||Offerlane||Laois||
|-
| Newtown||Drum||Roscommon||
|-
| Newtown||Termonbarry||Roscommon||
|-
| Newtown||Kilteevan||Roscommon||
|-
| Newtown||Oran||Roscommon||
|-
| Newtown||Creagh||Roscommon||
|-
| Newtown||Bumlin||Roscommon||
|-
| Newtown||Ahamlish||Sligo||
|-
| Newtown||Castleconor||Sligo||
|-
| Newtown||Ballymurreen||Tipperary||
|-
| Newtown||Holycross||Tipperary||
|-
| Newtown||Bourney||Tipperary||
|-
| Newtown||Corbally||Tipperary||
|-
| Newtown||Ballycahill||Tipperary||
|-
| Newtown||Templebeg||Tipperary||
|-
| Newtown||Dorrha||Tipperary||
|-
| Newtown||Templeachally||Tipperary||
|-
| Newtown||Youghalarra||Tipperary||
|-
| Newtown||Ballymackey||Tipperary||
|-
| Newtown||Clonbeg||Tipperary||
|-
| Newtown||Solloghodbeg||Tipperary||
|-
| Newtown||Killaloan||Tipperary||
|-
| Newtown||Aghacrew||Tipperary||
|-
| Newtown||Baptistgrange||Tipperary||
|-
| Newtown||Erry||Tipperary||
|-
| Newtown||Knockgraffon||Tipperary||
|-
| Newtown||Templemichael||Waterford||
|-
| Newtown||Ardmore||Waterford||
|-
| Newtown||Kinsalebeg||Waterford||
|-
| Newtown||Dungarvan||Waterford||
|-
| Newtown||Modelligo||Waterford||
|-
| Newtown||Rossmire||Waterford||
|-
| Newtown||Stradbally||Waterford||
|-
| Newtown||Crooke||Waterford||
|-
| Newtown||Kilculliheen||Waterford||
|-
| Newtown||St. John's Without||Waterford||
|-
| Newtown||Castletowndelvin||Westmeath||
|-
| Newtown||Mayne||Westmeath||
|-
| Newtown||Mullingar||Westmeath||
|-
| Newtown||Ballymore||Westmeath||
|-
| Newtown||Donaghmore||Wexford||
|-
| Newtown||Kilmuckridge||Wexford||
|-
| Newtown||Adamstown||Wexford||
|-
| Newtown||Killann||Wexford||
|-
| Newtown||Bannow||Wexford||
|-
| Newtown||Killag||Wexford||
|-
| Newtown||Kilmore||Wexford||
|-
| Newtown||Kilturk||Wexford||
|-
| Newtown||Taghmon||Wexford||
|-
| Newtown||Kilscoran||Wexford||
|-
| Newtown||Rathmacknee||Wexford||
|-
| Newtown||St. Peter's||Wexford||
|-
| Newtown||Ferns||Wexford||
|-
| Newtown||Monart||Wexford||
|-
| Newtown||Carrick||Wexford||
|-
| Newtown||Drumkay||Wicklow||
|-
| Newtown||Hollywood||Wicklow||
|-
| Newtown||Kilmacanoge||Wicklow||
|-
| Newtown||Mullinacuff||Wicklow||
|-
| Newtown||Donaghmore||Wicklow||
|-
| Newtown||Kilranelagh||Wicklow||
|-
| Newtown||Drumcannon||Waterford||
|-
| Newtown||Islandikane||Waterford||
|-
| Newtown||Kilmeadan||Waterford||
|-
| Newtownadam||Caher||Tipperary||
|-
| Newtownallen||Ballaghmoon||Kildare||
|-
| Newtown Anderson T.||Calry||Sligo||
|-
| Newtownanner Demesne||Kilsheelan||Tipperary||
|-
| Newtown Ards T.||Newtownards ||Down||
|-
| Newtownbabe||Ballybarrack||Louth||
|-
| Newtown (Baker)||Earlstown||Kilkenny||
|-
| Newtown or Ballyfallon||Athboy||Meath||
|-
| Newtown or Ballynoe||Ardoyne||Carlow||
|-
| Newtownbalregan||Castletown||Louth||
|-
| Newtown Baltracey||Tipper||Kildare||
|-
| Newtownbarry||St. Mary's Newtownbarry||Wexford||
|-
| Newtownbarry T.||St. Mary's Newtownbarry||Wexford||
|-
| Newtown Bellew T.||Moylough||Galway||
|-
| Newtownbert||Kilberry||Kildare||
|-
| Newtown Big||Kilcowan||Wexford||
|-
| Newtown Blackrock||Monkstown||Dublin||Dublin Barony
|-
| Newtown Blackrock||Monkstown||Dublin||Rathdown Barony
|-
| Newtownblake||Kilthomas||Galway||
|-
| Newtownbond||Killoe||Longford||
|-
| Newtownboswell||Killiskey||Wicklow||
|-
| Newtownbracklagh||Duniry||Galway||
|-
| Newtownbreda T.||Knockbreda||Down||
|-
| Newtownburke||Inishkeel||Donegal||
|-
| Newtown Butler T.||Galloon||Fermanagh||
|-
| Newtown Butler T.||Oranmore||Galway||
|-
| Newtown Carradoan||Killygarvan||Donegal||
|-
| Newtowncarrigans||Dunamon||Roscommon||
|-
| Newtown Castlebyrn||Monkstown||Dublin||
|-
| Newtowncliffony||Ahamlish||Sligo||
|-
| Newtownclonbun||Newtownclonbun||Meath||
|-
| Newtown or Cloneen||Killyon||Meath||
|-
| Newtown Commons||Greenoge||Meath||
|-
| Newtown or Commons||St. Mary's||Wexford||Bantry Barony
|-
| Newtowncorduff||Lusk||Dublin||
|-
| Newtown Crommelin T.||Newtown Crommelin||Antrim||
|-
| Newtowncunningham||Allsaints||Donegal||
|-
| Newtown Cunningham T.||Allsaints||Donegal||
|-
| Newtown (Darcy)||Dunmore||Galway||
|-
| Newtown (Darcy)||Tuam||Galway||
|-
| Newtowndarver||Darver||Louth||
|-
| Newtown Dillon T.||Kilbeagh||Mayo||
|-
| Newtowndonore||Downings||Kildare||
|-
| Newtowndrangan||Drangan||Tipperary||
|-
| Newtowndrumgornan||Killymard||Donegal||
|-
| Newtown East||Moyarta||Clare||
|-
| Newtowneyre||Kiltormer||Galway||
|-
| Newtownfane||Louth||Louth||
|-
| Newtown Farragher||Cloonygormican||Roscommon||
|-
| Newtownflanigan||Cashel||Longford||
|-
| Newtown Forbes T.||Clongesh||Longford||
|-
| Newtownfore||Aughnish||Donegal||
|-
| Newtown Girley||Girley||Meath||
|-
| Newtown (Glynn)||Kilmacduagh||Galway||
|-
| Newtowngore||Carrigallen||Leitrim||
|-
| Newtown Gore T.||Carrigallen||Leitrim||
|-
| Newtown Great||Rathmore||Kildare||
|-
| Newtowngrove or Grovehall||Kilmacrenan||Donegal||
|-
| Newtown (Guest)||Modreeny||Tipperary||
|-
| Newtownhamilton||Killea||Donegal||
|-
| Newtown Hamilton T.||Newtownhamilton||Armagh||
|-
| Newtown (Hodgins)||Modreeny||Tipperary||
|-
| Newtownhortland||Scullogestown||Kildare||
|-
| Newtownkelly||Clontuskert||Galway||
|-
| Newtown Kilcashel||Moore||Roscommon||
|-
| Newtown Kilcolgan||Kilcolgan||Galway||
|-
| Newtown Knockaleva||Mosstown||Louth||
|-
| Newtownlaragh||Kilcock||Kildare||
|-
| Newtown Limavady alias Rathbrady Beg||Drumachose||Derry||
|-
| Newtown Limavady T.||Drumachose||Derry||
|-
| Newtown Little||Kilgobbin||Dublin||
|-
| Newtown Little||Rathfarnham||Dublin||
|-
| Newtown Little||Rathmore||Kildare||
|-
| Newtown Little||Kilcowan ||Wexford||
|-
| Newtownlow||Newtown||Westmeath||
|-
| Newtown Lower||Saggart||Dublin||
|-
| Newtown Lower||Newtownlennan||Tipperary||
|-
| Newtown Lower||Inch||Wexford||
|-
| Newtown Lower||Tikillin||Wexford||
|-
| Newtownlynch||Kinvarradoorus||Galway||
|-
| Newtown (Lynott)||Dunmore||Galway||
|-
| Newtownmacabe||Taghadoe||Kildare||
|-
| Newtown Monasterboice||Monasterboice||Louth||
|-
| Newtownmoneenluggagh||Scullogestown||Kildare||
|-
| Newtownmountkennedy||Newcastle Upper||Wicklow||
|-
| Newtownmountkennedy T.||Newcastle Upper||Wicklow||
|-
| Newtownmoyaghy||Moyglare||Meath||
|-
| Newtownmoyaghy||Rodanstown||Meath||
|-
| Newtownmoynagh||Trim||Meath||
|-
| Newtown North||Shandrum||Cork||
|-
| Newtown North||Ballynakill||Galway||Leitrim Barony
|-
| Newtown North||Oola||Limerick||
|-
| Newtown North||Crossboyne||Mayo||
|-
| Newtown North||Donohill||Tipperary||
|-
| Newtownpark||Kill||Dublin||
|-
| Newtownpark||Rathmore||Kildare||
|-
| Newtown Park T.||Stillorgan||Dublin||
|-
| Newtownpilsworth||Dunmanoge||Kildare||
|-
| Newtownrathganley||Kilmore||Meath||
|-
| Newtown (Regan)||Kilmacduagh||Galway||
|-
| Newtown Sandes T.||Murher||Kerry||
|-
| Newtownsaunders||Baltinglass||Wicklow||
|-
| Newtown (Shea)||Earlstown||Kilkenny||
|-
| Newtown or Skirk||Skirk||Laois||
|-
| Newtown South||Shandrum||Cork||
|-
| Newtown South||Ballynakill||Galway||Leitrim Barony
|-
| Newtown South||Oola||Limerick||
|-
| Newtown South||Crossboyne||Mayo||
|-
| Newtown South||Donohill||Tipperary||
|-
| Newtown Springfield||Clondavaddog||Donegal||
|-
| Newtownstalaban||Beaulieu||Louth||
|-
| Newtownstalaban||Tullyallen||Louth||
|-
| Newtown Stewart||Ardstraw||Tyrone||
|-
| Newtown Stewart T.||Ardstraw||Tyrone||
|-
| Newtown T.||Shandrum||Cork||
|-
| Newtown T.||Seapatrick||Down||
|-
| Newtown T.||Lusmagh||Offaly||
|-
| Newtown Upper||Kilbroney||Down||
|-
| Newtown Upper||Saggart||Dublin||
|-
| Newtown Upper||Newtownlennan||Tipperary||
|-
| Newtown Upper||Inch||Wexford||Gorey Barony
|-
| Newtown Upper||Tikillin||Wexford||
|-
| Newtown Vevay T.||Bray||Wicklow||
|-
| Newtown West||Moyarta||Clare||
|-
| Newtownwhite||Ballysakeery||Mayo||
|-
| Newvillage||Rahoon||Galway||
|-
| Newvillage||Killian||Galway||
|-
| Newvillage||Kilcummin||Galway||
|-
| Niblock||Antrim||Antrim||
|-
| Nicharee||Duncormick||Wexford||
|-
| Nicholastown||Cloncurry||Kildare||
|-
| Nicholastown||Kilcullen||Kildare||
|-
| Nicholastown||Tankardstown||Kildare||
|-
| Nicholastown||Kilmenan||Kilkenny||
|-
| Nicholastown||Kilcolumb||Kilkenny||
|-
| Nicholastown||Pollrone||Kilkenny||
|-
| Nicholastown||Philipstown||Louth||
|-
| Nicholastown||Port||Louth||
|-
| Nicholastown||Derrygrath||Tipperary||
|-
| Nicholastown||Whitechurch||Waterford||
|-
| Nicholastown||Noughaval||Westmeath||
|-
| Nicholastown||Churchtown ||Westmeath||
|-
| Nicker||Grean||Limerick||
|-
| Nickeres||Emly||Tipperary||
|-
| Nicker T.||Grean||Limerick||
|-
| Ninch||Julianstown||Meath||
|-
| Nineacres||Annaghdown||Galway||
|-
| Nineacres||Carn||Wexford||
|-
| Ninemilehouse||Templemichael||Tipperary||
|-
| Ninemilehouse T.||Grangemockler||Tipperary||also in Templemichael parish.
|-
| Ninemilehouse T.||Templemichael||Tipperary||also in Grangemockler parish.
|-
| Nineteenacres||Carn||Wexford||
|-
| Noan||Graystown||Tipperary||
|-
| Noard||Twomileborris||Tipperary||
|-
| Nobber||Nobber||Meath||
|-
| Nobber T.||Nobber||Meath||
|-
| Nodstown||Ardmayle||Tipperary||
|-
| Nodstown North||Ardmayle||Tipperary||
|-
| Nodstown South||Ardmayle||Tipperary||
|-
| Noggusboy||Gallen||Offaly||
|-
| Noggusduff||Gallen||Offaly||
|-
| Noghan||Drumlane||Cavan||
|-
| Nohaval||Nohaval||Cork||
|-
| Nohavaldaly||Nohavaldaly||Cork||
|-
| Nohaval Lower||Nohavaldaly||Cork||
|-
| Nohaval North||Nohaval||Kerry||
|-
| Nohaval South||Nohaval||Kerry||
|-
| Nohaval T.||Nohaval||Cork||
|-
| Nohaval Upper||Nohavaldaly||Cork||
|-
| Nolagh||Shercock||Cavan||
|-
| Nonsuch||Mayne||Westmeath||
|-
| Nooaff East||Drumcliff||Clare||
|-
| Nooaff West||Drumcliff||Clare||
|-
| Nooan||Killinaboy||Clare||
|-
| Nooan||Ruan||Clare||
|-
| Nook||Clones||Monaghan||
|-
| Nook||St. James & Dunbrody||Wexford||
|-
| Norbrinstown or Normanstown||Kells||Meath||
|-
| Normangrove||Killinny||Galway||
|-
| Normansgrove||Dunboyne||Meath||
|-
| Normanstown or Norbrinstown||Kells||Meath||
|-
| Norrira||Clonca||Donegal||
|-
| Norrisland||Lismore and Mocollop||Waterford||
|-
| Norrismount||Toome||Wexford||
|-
| Norristown||Kilmannan||Wexford||
|-
| Northampton||Kinvarradoorus||Galway||
|-
| Northbrook||Aughrim||Galway||
|-
| North Bull Islands||Raheny||Dublin||
|-
| North Bull or The Island||Clontarf||Dublin||
|-
| North East Division||Carrickfergus||Antrim||
|-
| Northgrove||Offerlane||Laois||
|-
| North Island||Moyrus||Galway||
|-
| North & South Lislea||Bodoney Upper||Tyrone||
|-
| Northyard||Bumlin||Roscommon||
|-
| Noughaval||Doora||Clare||
|-
| Noughaval||Noughaval||Clare||
|-
| Noughaval||Noughaval||Westmeath||
|-
| Novally||Ramoan||Antrim||
|-
| Nugentstown||Balrathboyne||Meath||
|-
| Nunsacre||Clonfert||Galway||
|-
| Nuns Island||Bunown||Westmeath||
|-
| Nunsland||Rathmore||Kildare||
|-
| Nun's Quarter||Inishargy||Down||
|-
| Nunstown||Aghadoe||Kerry||
|-
| Nurchossy Irish||Clogher||Tyrone||
|-
| Nurchossy Scotch||Clogher||Tyrone||
|-
| Nure||Killasnet||Leitrim||
|-
| Nure||Ardagh||Mayo||
|-
| Nure Beg||Killanny||Monaghan||
|-
| Nure Beg||Magheracloone||Monaghan||
|-
| Nure or Lilliput||Dysart||Westmeath||
|-
| Nure More||Killanny||Monaghan||
|-
| Nure More||Magheracloone||Monaghan||
|-
| Nurney||Agha||Carlow||
|-
| Nurney||Nurney||Carlow||
|-
| Nurney ||Nurney||Kildare||Carbury Barony
|-
| Nurney||Nurney||Kildare||Offaly West Barony
|-
| Nurney Bog||Nurney||Kildare||Offaly West Barony
|-
| Nurney Demesne||Nurney||Kildare||Offaly West Barony
|-
| Nurney T.||Nurney||Carlow||
|-
| Nurney T.||Nurney ||Kildare||Offaly West Barony
|-
| Nurserypark or Corrabaun||Monivea||Galway||
|-
| Nursetown Beg||Kilshannig||Cork||
|-
| Nursetown More||Kilshannig||Cork||
|-
| Nutfield||Drung||Cavan||
|-
| Nutfield||Templemaley||Clare||
|-
| Nutfield||Aghavea||Fermanagh||
|-
| Nutgrove||Rosenallis||Laois||
|-
| Nutgrove or Feebrack||Tynagh||Galway||
|-
| Nut Island||Lickmolassy||Galway||
|-
| Nut Island||Cashel ||Longford||
|-
| Nutstown||Ballymadun||Dublin||
|-
| Nutgrove||Kilgullane||Cork||
|-
| Nuttstown||Kilbride||Meath||Dunboyne Barony
|-
| Nymphhall||Killea||Waterford||
|-
| Nymphsfield||Cong||Mayo||
|-
| Nyra||Rosenallis||Laois||
|-
| Oaghmonicroy||Bodoney Lower||Tyrone||
|-
| Oakfield||Kiltenanlea||Clare||
|-
| Oakfield||Cleenish||Fermanagh||
|-
| Oakfield||Cloonfinlough||Roscommon||
|-
| Oakfield Demesne||Raphoe||Donegal||
|-
| Oakfield or Derrydarragh||St. John's||Sligo||
|-
| Oakfield or Gortnandarragh||Killannin||Galway||
|-
| Oakhampton||Kilnarath||Tipperary||
|-
| Oaklands||Kildress||Tyrone||
|-
| Oaklands||St. Mary's||Wexford||Bantry Barony
|-
| Oakleypark||Kildrought||Kildare||
|-
| Oakleypark||Seirkieran||Offaly||
|-
| Oakleypark or Lawrencetown||Dulane||Meath||
|-
| Oakpark or Painestown||Painestown||Carlow||
|-
| Oakport Demesne||Ardcarn||Roscommon||
|-
| Oakstown||Trim||Meath||
|-
| Oaktate||Louth||Louth||
|-
| Oakwood||Hollywood||Wicklow||
|-
| Oakwood or Drummully||Castleterra||Cavan||
|-
| Oakwood North||Abbeyknockmoy||Galway||
|-
| Oakwood South||Abbeyknockmoy||Galway||
|-
| Oatencake||Mogeesha||Cork||
|-
| Oatfield||Clonlea||Clare||
|-
| Oatfield||Aughrim||Galway||
|-
| Oatlands||Cahervally||Limerick||
|-
| Oberstown||Lusk||Dublin||
|-
| Oberstown||Shanlis||Louth||
|-
| Obertstown||Skreen||Meath||
|-
| O'Briensbridge||O'Briensbridge||Clare||
|-
| O'Briensbridge T.||O'Briensbridge||Clare||
|-
| Obrienscastle||Inchicronan||Clare||
|-
| O'Callaghansmills T.||Killuran||Clare||
|-
| Ockanaroe||Clonenagh & Clonagheen||Laois||
|-
| Odagh||Odagh||Kilkenny||
|-
| Oddacres||Rahoon||Galway||
|-
| Odder||Tara||Meath||
|-
| O'Donnell's Island||Donegal||Donegal||
|-
| O'Donnell's Island or Illaunbeg||Killadysert||Clare||
|-
| Oggal||Killinagh||Cavan||
|-
| Ogham||Kilturra||Sligo||
|-
| Ogham||Tawnagh||Sligo||
|-
| Oghambaun||Achonry||Sligo||
|-
| Ogherbeg||Killymard||Donegal||
|-
| Oghermong||Caher||Kerry||
|-
| Oghery||Moycullen||Galway||
|-
| Oghil||Monasterevin||Kildare||
|-
| Oghil||Killoe||Longford||
|-
| Oghil||Kilglass||Sligo||
|-
| Oghil Beg||Clonfert||Galway||
|-
| Oghill||Ballintemple||Cavan||
|-
| Oghill||Tullyfern||Donegal||
|-
| Oghill||Drumkeeran||Fermanagh||
|-
| Oghill||Trory||Fermanagh||
|-
| Oghill||Aghalurcher||Fermanagh||
|-
| Oghill||Inishmore||Galway||
|-
| Oghill||Mohill||Leitrim||
|-
| Oghill||Tamlaght Finlagan||Derry||
|-
| Oghill||Cumber Lower||Derry||
|-
| Oghill||Clontibret||Monaghan||
|-
| Oghill||Donaghmoyne||Monaghan||
|-
| Oghill||Ballyclog||Tyrone||
|-
| Oghillees||Burrishoole||Mayo||
|-
| Oghillicartan||Drumkeeran||Fermanagh||
|-
| Oghil Lower||Redcross||Wicklow||
|-
| Oghilly||Ballynakill||Galway||Leitrim Barony
|-
| Oghil More||Clonfert||Galway||
|-
| Oghil Upper||Redcross||Wicklow||
|-
| Oghly Island||Moyrus||Galway||
|-
| O'Grady's Island or Inishoul||Killadysert||Clare||
|-
| Ogulla||Ogulla||Roscommon||
|-
| Oilgate or Mullinnagore||Edermine||Wexford||
|-
| Oilgate T.||Edermine||Wexford||
|-
| Okyle||Lismore and Mocollop||Waterford||
|-
| Oldabbey||Inishkenny||Cork||
|-
| Oldabbey||Robertstown||Limerick||
|-
| Old Barr||Devenish||Fermanagh||
|-
| Oldbawn||Tallaght||Dublin||
|-
| Oldboley||Taghmon||Wexford||
|-
| Oldboleys||Powerscourt||Wicklow||
|-
| Oldborris||Offerlane||Laois||
|-
| Oldbridge||Donore||Meath||
|-
| Oldbridge||St. Mary's Clonmel||Waterford||
|-
| Oldcamp||Kyle||Laois||
|-
| Oldcarton||Laraghbryan||Kildare||
|-
| Oldcastle||Magourney||Cork||
|-
| Oldcastle||Kilconierin||Galway||
|-
| Oldcastle||Meelick||Mayo||
|-
| Oldcastle||Oldcastle||Meath||
|-
| Oldcastle||Bourney||Tipperary||
|-
| Oldcastle||Toem||Tipperary||
|-
| Oldcastle||Newtownlennan||Tipperary||
|-
| Oldcastle Lower||Killamery||Kilkenny||
|-
| Oldcastletown||Kildorrery||Cork||
|-
| Oldcastle T.||Oldcastle||Meath||
|-
| Oldcastle Upper||Killamery||Kilkenny||
|-
| Old Church||Tickmacrevan||Antrim||
|-
| Old Church Glebe||Kilcar||Donegal||
|-
| Old Church Yard||Termonmaguirk||Tyrone||
|-
| Oldconnaught||Oldconnaught||Dublin||
|-
| Oldconnell||Oldconnell||Kildare||
|-
| Oldcourt||Clonmel||Cork||
|-
| Oldcourt||Templebodan||Cork||
|-
| Oldcourt||Carrigaline||Cork||
|-
| Oldcourt||Doneraile||Cork||
|-
| Oldcourt||Ringrone||Cork||
|-
| Oldcourt||Creagh||Cork||
|-
| Oldcourt||Tallaght||Dublin||
|-
| Oldcourt||Kilmore||Kildare||
|-
| Oldcourt||Kilberry||Kildare||
|-
| Oldcourt||Clonamery||Kilkenny||
|-
| Oldcourt||Fiddown||Kilkenny||
|-
| Oldcourt||Croagh||Limerick||
|-
| Oldcourt||Killabban||Laois||
|-
| Oldcourt||Finnoe||Tipperary||
|-
| Oldcourt||Adamstown||Wexford||
|-
| Oldcourt||Whitechurch||Wexford||
|-
| Oldcourt||Blessington||Wicklow||
|-
| Oldcourt||Bray||Wicklow||
|-
| Oldcourt||Rathsallagh||Wicklow||
|-
| Oldcourt East||Templenacarriga||Cork||
|-
| Oldcourt West||Templenacarriga||Cork||
|-
| Oldcroghan||Croghan||Offaly||
|-
| Oldderrig||Killeshin||Laois||
|-
| Oldforge||Drumbeg||Antrim||
|-
| Oldforge||Killarney||Kerry||
|-
| Old-fort||Ringrone||Cork||
|-
| Old Freehold||Kilwaughter||Antrim||
|-
| Oldglass||Aghaboe||Laois||
|-
| Oldglass||Bordwell||Laois||
|-
| Old Glebe or Cartron||Kilgefin||Roscommon||
|-
| Oldgraigue||Moyglare||Meath||
|-
| Oldgrange||Fontstown||Kildare||
|-
| Oldgrange||Narraghmore||Kildare||
|-
| Oldgrange||Monasterevin||Kildare||
|-
| Oldgrange||Graiguenamanagh||Kilkenny||
|-
| Oldgrange||Easky||Sligo||
|-
| Oldgrange||Tullaghmelan||Tipperary||
|-
| Oldgrange||Mothel||Waterford||
|-
| Oldhall||Mulrankin||Wexford||
|-
| Oldhead||Kilgeever||Mayo||
|-
| Oldhead or Downmacpatrick||Ringrone||Cork||
|-
| Oldkilcullen||Kilcullen||Kildare||
|-
| Oldleagh||Killabban||Laois||
|-
| Oldleighlin||Oldleighlin||Carlow||
|-
| Oldleighlin T.||Oldleighlin||Carlow||
|-
| Oldmill||Dysartenos||Laois||
|-
| Oldmill||Kilrane||Wexford||
|-
| Old Mills T.||Carncastle||Antrim||
|-
| Oldmilltown||Kilteel||Kildare||
|-
| Oldorchard||Rathfarnham||Dublin||
|-
| Oldpaddocks||Blessington||Wicklow||
|-
| Old Park||Shankill||Antrim||
|-
| Oldpark||St. Canice||Kilkenny||
|-
| Oldrock or Shancarrigeen||Cloonoghil||Sligo||
|-
| Oldstone||Muckamore (Grange of)||Antrim||
|-
| Oldstreet||Kilquain||Galway||
|-
| Oldtown||Ballyrashane||Antrim||
|-
| Oldtown||Ballyellin||Carlow||
|-
| Oldtown||Nurney||Carlow||
|-
| Oldtown||Clonmore||Carlow||
|-
| Oldtown||Kineagh||Carlow||
|-
| Oldtown||Leck||Donegal||
|-
| Oldtown||Clonmethan||Dublin||
|-
| Oldtown||Artaine||Dublin||
|-
| Oldtown||Coolock||Dublin||
|-
| Oldtown||Swords||Dublin||
|-
| Oldtown||Greatconnell||Kildare||
|-
| Oldtown||Naas||Kildare||
|-
| Oldtown||Killashee||Kildare||
|-
| Oldtown||Kildrought||Kildare||
|-
| Oldtown||Kilteel||Kildare||
|-
| Oldtown||Tullaroan||Kilkenny||
|-
| Oldtown||Grangemaccomb||Kilkenny||
|-
| Oldtown||Jerpointchurch||Kilkenny||
|-
| Oldtown||Burnchurch||Kilkenny||
|-
| Oldtown||Rahan||Offaly||
|-
| Oldtown||Killaderry||Offaly||
|-
| Oldtown||Ardagh||Longford||
|-
| Oldtown||Martry||Meath||
|-
| Oldtown||Kilcarn||Meath||
|-
| Oldtown||Gallow||Meath||
|-
| Oldtown||Rathcore||Meath||
|-
| Oldtown||Rathsaran||Laois||
|-
| Oldtown||Aghmacart||Laois||
|-
| Oldtown||Clonenagh and Clonagheen||Laois||
|-
| Oldtown||Kilmacumsy||Roscommon||
|-
| Oldtown||Templemore||Tipperary||
|-
| Oldtown||Castlelost||Westmeath||
|-
| Oldtown||Donaghmore||Wexford||
|-
| Oldtown||Tomhaggard||Wexford||
|-
| Oldtown||Ardcolm||Wexford||
|-
| Oldtown||Ballynure||Wicklow||
|-
| Oldtown (Bennett)||Hospital||Limerick||
|-
| Oldtown or Cornagleragh||Annagelliff||Cavan||
|-
| Oldtown Curralane||Kilrush||Wexford||
|-
| Old Town Deer Park||Ballyscullion||Derry||
|-
| Oldtown Demesne||Naas||Kildare||
|-
| Oldtowndonore||Downings||Kildare||
|-
| Old Town Downing||Ballyscullion||Derry||
|-
| Oldtownhill||Tullaroan||Kilkenny||
|-
| Oldtown Kilcashel||Moore||Roscommon||
|-
| Oldtown or Puddingstreet||Drumraney||Westmeath||
|-
| Oldtown (Ryan)||Hospital||Limerick||
|-
| Oldtown T.||Clonmethan||Dublin||
|-
| Oldtully||Oldcastle||Meath||
|-
| Old Warren||Blaris||Antrim||
|-
| Ollatrim||Aghnameadle||Tipperary||
|-
| Oltore||Donaghpatrick||Galway||
|-
| Omagh||Drumragh||Tyrone||
|-
| Omagh T.||Drumragh||Tyrone||
|-
| Omard||Ballymachugh||Cavan||
|-
| Omaun Beg||Killererin||Galway||
|-
| Omaun More||Killererin||Galway||
|-
| O'Meara's Acres||Kilbarron||Tipperary||
|-
| Omey Island, Cartoorbeg||Omey||Galway||
|-
| Omey Island, Cloon||Omey||Galway||
|-
| Omey Island, Gooreenatinny||Omey||Galway||
|-
| Omey Island, Sturrakeen||Omey||Galway||
|-
| Omey Island, Gooreen||Omey||Galway||
|-
| Omoresforest||Clonenagh and Clonagheen||Laois||
|-
| Onagh||Taghmaconnell||Roscommon||
|-
| Onagh||Powerscourt||Wicklow||
|-
| Onaght||Inishmore||Galway||
|-
| Ongenstown||Ardbraccan||Meath||
|-
| Ongenstown||Duleek||Meath||
|-
| Onomy||Muckno||Monaghan||
|-
| Ooankeagh||Ruan||Clare||
|-
| Oolagh East||Knockane||Kerry||
|-
| Oolagh West||Knockane||Kerry||
|-
| Oolahills East||Oola||Limerick||
|-
| Oolahills West||Oola||Limerick||
|-
| Oola T.||Oola||Limerick||
|-
| Oorid||Kilcummin||Galway||
|-
| Oorla||Robertstown||Limerick||
|-
| Oort||Culdaff||Donegal||
|-
| Oory||Tagheen||Mayo||
|-
| Ora Beg||Cleenish||Fermanagh||
|-
| Oram||Muckno||Monaghan||
|-
| Oran ||Oran||Roscommon||
|-
| Oran Beg||Oranmore||Galway||
|-
| Oranhill||Oranmore||Galway||
|-
| Oranhill||Rahoon||Galway||
|-
| Oran More||Oranmore||Galway||
|-
| Oranmore T.||Oranmore||Galway||
|-
| Oranstown||Dunboyne||Meath||
|-
| Orchard||Nurney||Carlow||
|-
| Orchard||Moyacomb||Carlow||
|-
| Orchard Island||Ardcarn ||Roscommon||
|-
| Orchard Lower||Fossy or Timahoe||Laois||
|-
| Orchardstown||Kilmacleague||Waterford||
|-
| Orchardstown||Kilburne||Waterford||
|-
| Orchardstown East||Newchapel||Tipperary||
|-
| Orchardstown West||Newchapel||Tipperary||
|-
| Orchard Upper||Fossy or Timahoe||Laois||
|-
| Ordnance Ground||Kilcummin||Galway||
|-
| O'Reilly's Island||Kilronan||Roscommon||
|-
| Ories||Kilcleagh||Westmeath||
|-
| Orinish Island||Inishkeel||Donegal||
|-
| Oristown||Clongill||Meath||
|-
| Oristown||Teltown ||Meath||
|-
| Oristown T.||Teltown||Meath||
|-
| Oritor||Kildress||Tyrone||
|-
| Orkneys||Bourney||Tipperary||
|-
| Orlagh||Cruagh||Dublin||
|-
| Orlock||Bangor||Down||
|-
| Ormond's Island||Tuosist||Kerry||
|-
| Oro More or Tullybrack||Cleenish||Fermanagh||
|-
| Orristown||Kilmacree||Wexford||
|-
| Orthon's Island||Kilcaskan||Cork||
|-
| Osberstown||Naas||Kildare||
|-
| O'Shea's Acres||Kilseily||Clare||
|-
| Osierbrook||Seirkieran||Offaly||
|-
| Ossoryhill||Kilderry||Kilkenny||
|-
| Otter Island||Annaduff||Leitrim||
|-
| Otters Island||Lickmolassy||Galway||
|-
| Otterstown||Athboy||Meath||
|-
| Oughaval||Stradbally||Laois||
|-
| Oughaval||Kilmacteige||Sligo||
|-
| Oughtagh||Ballynakill||Galway||Ballymoe Barony
|-
| Oughtagh||Kilbegnet||Galway||
|-
| Oughtagh||Cumber Lower||Derry||
|-
| Oughtagh||Templemore||Mayo||
|-
| Oughtagorey||Rossinver||Sligo||
|-
| Oughtboy||Bodoney Upper||Tyrone||
|-
| Oughtcarn||Templecarn||Donegal||
|-
| Oughtdarra||Killilagh||Clare||
|-
| Oughtdoorish||Bodoney Upper||Tyrone||
|-
| Oughter||Lemanaghan||Offaly||
|-
| Oughteragh||Oughteragh||Leitrim||
|-
| Oughterard||Kilballyowen||Clare||
|-
| Oughterard||Oughterard||Kildare||
|-
| Oughterard||Desertcreat||Tyrone||
|-
| Oughterard||Dromore||Tyrone||
|-
| Oughterard or Caurans Upper||Turlough||Mayo||
|-
| Oughterard T.||Kilcummin||Galway||
|-
| Oughterdrum||Belleek||Fermanagh||
|-
| Oughterlin||Killygarvan||Donegal||
|-
| Oughtihery||Aghabulloge||Cork||
|-
| Oughtiv||Dromod||Kerry||
|-
| Oughtmama||Oughtmama||Clare||
|-
| Oughtmame||Bodoney Upper||Tyrone||
|-
| Oughtmeen||Templecrone||Donegal||
|-
| Oughtminnee||Kilmoe||Cork||
|-
| Oughtnadrin||Drumhome||Donegal||
|-
| Oughtnadrin Barr, Tullygallen, and Tullywee||Drumhome||Donegal||
|-
| Oughtnamwella||Bodoney Upper||Tyrone||
|-
| Oughtohig||Kilcoe||Cork||
|-
| Oughty||Oughaval||Mayo||
|-
| Oughtymore||Magilligan||Derry||
|-
| Oughtymoyle||Magilligan||Derry||
|-
| Oulart||Meelnagh||Wexford||
|-
| Oulart||Kilnenor||Wexford||
|-
| Oulartard||Clone||Wexford||
|-
| Oulartleigh||Ballyhuskard||Wexford||
|-
| Oulart T.||Meelnagh||Wexford||
|-
| Oulartwick Beg||Kilcormick||Wexford||
|-
| Oulartwick More||Kilcormick||Wexford||
|-
| Ouley||Castleterra||Cavan||
|-
| Ouley||Saintfield||Down||
|-
| Ouley||Newry||Down||
|-
| Oultauns||Kilcommon||Mayo||Kilmaine Barony
|-
| Oultort||Lickmolassy||Galway||
|-
| Ouna or Eagle Hill||Layd||Antrim||
|-
| Ounagh||Kilmacteige||Sligo||
|-
| Ouragh||Tullowphelim||Carlow||
|-
| Ouris||Dunkerrin ||Offaly||
|-
| Outal||Grange of Dundermot||Antrim||
|-
| Outeragh||Outeragh||Tipperary||
|-
| Outhill||Ballyrashane||Antrim||
|-
| Outlack||Lisnadill||Armagh||
|-
| Outlands||Swords||Dublin||
|-
| Outlands of Grevally||Donaghenry||Tyrone||
|-
| Outleckan||Ballymyre||Armagh||
|-
| Outrath||Outrath||Kilkenny||
|-
| Ouvry||Magheross||Monaghan||
|-
| Ovaun||Shankill||Roscommon||
|-
| Ovenstown||Earlstown||Kilkenny||
|-
| Ovidstown||Cloncurry||Kildare||
|-
| Ovidstown||Straffan||Kildare||
|-
| Ovidstown||Taghadoe||Kildare||
|-
| Ovil||Dungiven||Derry||
|-
| Owenanirragh||Kilcommon||Mayo||Erris Barony
|-
| Owenavaddy or Riverstick||Killaan||Galway||
|-
| Owenbeg||Dungiven||Derry||
|-
| Owenbeg||Easky||Sligo||
|-
| Owenboy||Killymard||Donegal||
|-
| Owenboy||Fahan Lower||Donegal||
|-
| Owenboy||Crossmolina||Mayo||
|-
| Owenbreedin||Aghavea||Fermanagh||
|-
| Owenbristy||Ardrahan||Galway||
|-
| Owencam||Templeport||Cavan||
|-
| Owencloghy||Tickmacrevan||Antrim||
|-
| Owenduff||Achill||Mayo||
|-
| Owenduff||Kilcommon||Mayo||Erris Barony
|-
| Owengallees||Templeport||Cavan||
|-
| Owenglass||Kilcommon||Mayo||Erris Barony
|-
| Owenkillew and Barnahone||Fahan Lower||Donegal||
|-
| Owennagadragh||Donaghmore||Donegal||
|-
| Owenreagh||Ballynascreen||Derry||
|-
| Owenreagh||Leckpatrick||Tyrone||
|-
| Owen's & Bigg's-Lot||St. John Baptist||Tipperary||
|-
| Owen's Island||Kilcrohane||Cork||
|-
| Owenskerry||Aghalurcher||Fermanagh||
|-
| Owensland||Kilbride||Antrim||
|-
| Owenstown||Moyglare||Meath||
|-
| Owenstown||Rathmacknee||Wexford||
|-
| Owenstown or Trimleston||Taney||Dublin||
|-
| Owenteskiny||Inishkeel||Donegal||
|-
| Owenwee||Oughaval||Mayo||
|-
| Owenykeevan or Tawnamaddoo||Easky||Sligo||
|-
| Ower||Killursa||Galway||
|-
| Ower||Killannin||Galway||
|-
| Owey Island||Templecrone||Donegal||
|-
| Owlbeg||Clonygoose||Carlow||
|-
| Owl Island||Inishmacsaint||Fermanagh||
|-
| Ownagarry||Killorglin||Kerry||
|-
| Owning||Owning||Kilkenny||
|-
| Oxford||Killedan||Mayo||
|-
| Oxgrove||Killimorbologue||Galway||
|-
| Ox Island||Inishbofin||Mayo||
|-
| Oxpark||Modreeny||Tipperary||
|-
| Oxtown||Termonmaguirk||Tyrone||
|-
| Oysterhaven||Kilmonoge||Cork||
|-
| Oyster Island||Killaspugbrone||Sligo||
|-
|
|}
[[Category:Irish Townlands]]
{|border="1" cellpadding="4" cellspacing="0" style="border:\#c9c9c9 1px solid; margin: 1em 1em 1em 0; border-collapse: collapse;"
| align="center" style="background:#DDD;"|'''Townland'''
| align="center" style="background:#DDD;"|'''County'''
| align="center" style="background:#DDD;"|'''Parish'''
| align="center" style="background:#DDD;"|'''Remarks'''
|-
| Newgrange||Monknewtown||Meath||
|-
| Newgrove||Glanworth||Cork||
|-
| Newgrove||Killian||Galway||
|-
| Newgrove||Kilreekill||Galway||
|-
| Newgrove||Dysartmoon||Kilkenny||
|-
| Newgrove||Tedavnet||Monaghan||
|-
| Newgrove||Drumraney||Westmeath||
|-
| Newgrove or Ballyslattery||Tulla||Clare||
|-
| Newhaggard||Lusk||Dublin||
|-
| Newhaggard||Garristown||Dublin||
|-
| Newhaggard||Trim||Meath||
|-
| Newhaggard||Kilsharvan||Meath||
|-
| Newhall||Killone||Clare||
|-
| Newhall||Kiltartan||Galway||
|-
| Newhall||Ladytown||Kildare||
|-
| Newhall||Oldconnell||Kildare||
|-
| Newhall||Dunleer||Louth||
|-
| Newhall||Kilcooly||Tipperary||
|-
| Newhall or Gorteenafoly||Ettagh||Offaly||
|-
| Newhill||Ballymoney||Antrim||
|-
| Newhill||Twomileborris||Tipperary||
|-
| Newhouse||Gowran||Kilkenny||
|-
| Newhouse||Tullaherin||Kilkenny||
|-
| Newhouse||Termonfeckin||Louth||
|-
| Newhouse||Kilcowan||Wexford||
|-
| Newhouse||Ballymore||Wexford||
|-
| Newhouses||Kilrane||Wexford||
|-
| Newhouses||St. Helen's||Wexford||
|-
| Newinn T.||Knockgraffon||Tipperary||
|-
| Newland North||Killashee||Kildare||
|-
| Newlands||Glynn||Antrim||
|-
| Newlands||Clondalkin||Dublin||
|-
| Newlands||Burnchurch||Kilkenny||
|-
| Newlands Demesne||Clondalkin||Dublin||
|-
| Newlands Demesne||Tallaght||Dublin||
|-
| Newland South||Killashee||Kildare||
|-
| Newland West||Killashee||Kildare||
|-
| Newlawn||Terryglass||Tipperary||
|-
| Newmarket||Tomfinlough||Clare||
|-
| Newmarket||Clonfert||Cork||
|-
| Newmarket||Aghaviller||Kilkenny||
|-
| Newmarket on Fergus T.||Tomfinlough||Clare||
|-
| Newmarket T.||Clonfert||Cork||
|-
| Newmill||Aughnish||Donegal||
|-
| Neworchard||St. John's||Kilkenny||
|-
| Newpaddocks||Blessington||Wicklow||
|-
| New Park||Antrim||Antrim||
|-
| Newpark||Feenagh||Clare||
|-
| Newpark||Templemaley||Clare||
|-
| Newpark||Ward||Dublin||
|-
| Newpark||Kill||Dublin||
|-
| Newpark||Drumkeeran||Fermanagh||
|-
| Newpark||Kilmeage||Kildare||
|-
| Newpark||Kilmaganny||Kilkenny||
|-
| Newpark||Croagh||Limerick||
|-
| Newpark||Effin||Limerick||
|-
| Newpark||Cashel||Longford||
|-
| Newpark||Kilconduff||Mayo||
|-
| Newpark||Kilmorgan||Sligo||
|-
| Newpark||Ballysheehan||Tipperary||
|-
| Newpark||Kilcooly||Tipperary||
|-
| New Park||Dromore||Tyrone||
|-
| Newpark||Donaghmore||Wicklow||
|-
| Newpark or Loughanavagh||St. Feighin's||Westmeath||
|-
| Newpark Lower||St. Maul's||Kilkenny||
|-
| Newpark Upper||St. Maul's||Kilkenny||
|-
| Newpass Demesne||Rathaspick||Westmeath||
|-
| Newport||Rathreagh||Longford||
|-
| Newport||Burrishoole||Mayo||
|-
| Newport||Kilvellane||Tipperary||
|-
| Newport East||Kilcockan||Waterford||
|-
| Newport T.||Burrishoole||Mayo||
|-
| Newport T.||Kilvellane||Tipperary||
|-
| Newport West||Kilcockan||Waterford||
|-
| Newquay||Oughtmama||Clare||
|-
| Newragh||Louth||Louth||
|-
| Newrath||Dromiskin||Louth||
|-
| Newrath||Louth||Louth||
|-
| Newrath||Kilbeg||Meath||
|-
| Newrath||Slane||Meath||
|-
| Newrath||Kilculliheen||Waterford||
|-
| Newrath||Rathnew||Wicklow||
|-
| Newrath Big||Siddan||Meath||
|-
| Newrath Big||Kells||Meath||
|-
| Newrath Little||Kells||Meath||
|-
| Newross||Kilnarath||Tipperary||
|-
| Newross||St. Mary's||Wexford||Bantry barony
|-
| New Ross T.||St. Mary's||Wexford||
|-
| Newrow||Clonleigh||Donegal||
|-
| Newrow||Raphoe||Donegal||
|-
| Newrow||Kilteel||Kildare||
|-
| Newry||Clogher||Tyrone||
|-
| Newry||Moyacomb||Wicklow||
|-
| Newry T.||Newry||Armagh||
|-
| Newry T.||Newry||Down||
|-
| Newstone||Drumcondra||Meath||
|-
| Newstown||Ardoyne||Carlow||
|-
| Newtate or Drummoan||Killesher||Fermanagh||
|-
| Newtown||Ardclinis||Antrim||
|-
| Newtown||Killevy||Armagh||
|-
| Newtown||Agha||Carlow||
|-
| Newtown||St. Mullin's||Carlow||
|-
| Newtown||Kilmore||Cavan||
|-
| Newtown||Kinawley||Cavan||
|-
| Newtown||Templeport||Cavan||
|-
| Newtown||Denn||Cavan||
|-
| Newtown||Drumcreehy||Clare||
|-
| Newtown||Killuran||Clare||
|-
| Newtown||Kiltenanlea||Clare||
|-
| Newtown||Mallow||Cork||
|-
| Newtown||Ballyhay||Cork||
|-
| Newtown||Doneraile||Cork||
|-
| Newtown||Kilmocomoge||Cork||
|-
| Newtown||Kilbroney||Down||
|-
| Newtown||Balscaddan||Dublin||
|-
| Newtown||Garristown||Dublin||
|-
| Newtown||Westpalstown||Dublin||
|-
| Newtown||Coolock||Dublin||
|-
| Newtown||St. Margaret's||Dublin||
|-
| Newtown||Swords||Dublin||
|-
| Newtown||Kiltiernan||Dublin||
|-
| Newtown||Cruagh||Dublin||
|-
| Newtown||Devenish||Fermanagh||
|-
| Newtown||Ballynakill||Galway||Ballymoe Barony
|-
| Newtown||Killeroran||Galway||
|-
| Newtown||Kilmacduagh||Galway||
|-
| Newtown||Kiltartan||Galway||
|-
| Newtown||Kilmalinoge||Galway||
|-
| Newtown||Moycullen||Galway||
|-
| Newtown||Abbeyknockmoy||Galway||
|-
| Newtown||Cloncurry||Kildare||
|-
| Newtown||Castledermot||Kildare||
|-
| Newtown||Killelan||Kildare||
|-
| Newtown||Kineagh||Kildare||
|-
| Newtown||Rathmore||Kildare||
|-
| Newtown||Tipper||Kildare||
|-
| Newtown||Killashee||Kildare||
|-
| Newtown||Laraghbryan||Kildare||
|-
| Newtown||Leixlip||Kildare||
|-
| Newtown||Kildare||Kildare||
|-
| Newtown||Rathangan||Kildare||
|-
| Newtown||Tully||Kildare||
|-
| Newtown||Ballyshannon||Kildare||
|-
| Newtown||Donaghcumper||Kildare||
|-
| Newtown||Kill||Kildare||
|-
| Newtown||Clomantagh||Kilkenny||
|-
| Newtown||Kilcooly||Kilkenny||
|-
| Newtown||St. Canice||Kilkenny||
|-
| Newtown||Graiguenamanagh||Kilkenny||
|-
| Newtown||St. John's||Kilkenny||
|-
| Newtown||Thomastown||Kilkenny||
|-
| Newtown||Dunkitt||Kilkenny||
|-
| Newtown||Kilmacow||Kilkenny||
|-
| Newtown||Dunnamaggan||Kilkenny||
|-
| Newtown||Mothell||Kilkenny||
|-
| Newtown||Roscomroe||Offaly||
|-
| Newtown||Rahan||Offaly||
|-
| Newtown||Kilcomin||Offaly||
|-
| Newtown||Castlejordan||Offaly||
|-
| Newtown||Lusmagh||Offaly||
|-
| Newtown||Geashill||Offaly||
|-
| Newtown||Kilcumreragh||Offaly||
|-
| Newtown||Kilmanaghan||Offaly||
|-
| Newtown||Caherconlish||Limerick||
|-
| Newtown||Inch St. Lawrence||Limerick||
|-
| Newtown||Kilmurry||Limerick||
|-
| Newtown||Tuoghcluggin||Limerick||
|-
| Newtown||Galbally||Limerick||
|-
| Newtown||Bruff||Limerick||
|-
| Newtown||Kilcornan||Limerick||
|-
| Newtown||Kilkeedy||Limerick||
|-
| Newtown||Hospital||Limerick||
|-
| Newtown||Kilpeacon||Limerick||
|-
| Newtown||Rathreagh||Longford||
|-
| Newtown||Ballymacormick||Longford||
|-
| Newtown||Killashee||Longford||
|-
| Newtown||Louth||Louth||Ardee Barony
|-
| Newtown||Termonfeckin||Louth||
|-
| Newtown||Louth||Louth ||Louth Barony
|-
| Newtown||Ballyovey ||Mayo||
|-
| Newtown||Burriscarra||Mayo||
|-
| Newtown||Kilmore||Mayo||
|-
| Newtown||Kilbelfad||Mayo||
|-
| Newtown||Killallon||Meath||
|-
| Newtown||Loughcrew||Meath||
|-
| Newtown||Colp||Meath||
|-
| Newtown||Duleek||Meath||
|-
| Newtown||Knockcommon||Meath||
|-
| Newtown||Cruicetown||Meath||
|-
| Newtown||Kilmainham||Meath||
|-
| Newtown||Newtown||Meath||
|-
| Newtown||Ratoath||Meath||
|-
| Newtown||Ardcath||Meath||
|-
| Newtown||Newtownclonbun||Meath||
|-
| Newtown||Aghmacart||Laois||
|-
| Newtown||Stradbally||Laois||
|-
| Newtown||Offerlane||Laois||
|-
| Newtown||Drum||Roscommon||
|-
| Newtown||Termonbarry||Roscommon||
|-
| Newtown||Kilteevan||Roscommon||
|-
| Newtown||Oran||Roscommon||
|-
| Newtown||Creagh||Roscommon||
|-
| Newtown||Bumlin||Roscommon||
|-
| Newtown||Ahamlish||Sligo||
|-
| Newtown||Castleconor||Sligo||
|-
| Newtown||Ballymurreen||Tipperary||
|-
| Newtown||Holycross||Tipperary||
|-
| Newtown||Bourney||Tipperary||
|-
| Newtown||Corbally||Tipperary||
|-
| Newtown||Ballycahill||Tipperary||
|-
| Newtown||Templebeg||Tipperary||
|-
| Newtown||Dorrha||Tipperary||
|-
| Newtown||Templeachally||Tipperary||
|-
| Newtown||Youghalarra||Tipperary||
|-
| Newtown||Ballymackey||Tipperary||
|-
| Newtown||Clonbeg||Tipperary||
|-
| Newtown||Solloghodbeg||Tipperary||
|-
| Newtown||Killaloan||Tipperary||
|-
| Newtown||Aghacrew||Tipperary||
|-
| Newtown||Baptistgrange||Tipperary||
|-
| Newtown||Erry||Tipperary||
|-
| Newtown||Knockgraffon||Tipperary||
|-
| Newtown||Templemichael||Waterford||
|-
| Newtown||Ardmore||Waterford||
|-
| Newtown||Kinsalebeg||Waterford||
|-
| Newtown||Dungarvan||Waterford||
|-
| Newtown||Modelligo||Waterford||
|-
| Newtown||Rossmire||Waterford||
|-
| Newtown||Stradbally||Waterford||
|-
| Newtown||Crooke||Waterford||
|-
| Newtown||Kilculliheen||Waterford||
|-
| Newtown||St. John's Without||Waterford||
|-
| Newtown||Castletowndelvin||Westmeath||
|-
| Newtown||Mayne||Westmeath||
|-
| Newtown||Mullingar||Westmeath||
|-
| Newtown||Ballymore||Westmeath||
|-
| Newtown||Donaghmore||Wexford||
|-
| Newtown||Kilmuckridge||Wexford||
|-
| Newtown||Adamstown||Wexford||
|-
| Newtown||Killann||Wexford||
|-
| Newtown||Bannow||Wexford||
|-
| Newtown||Killag||Wexford||
|-
| Newtown||Kilmore||Wexford||
|-
| Newtown||Kilturk||Wexford||
|-
| Newtown||Taghmon||Wexford||
|-
| Newtown||Kilscoran||Wexford||
|-
| Newtown||Rathmacknee||Wexford||
|-
| Newtown||St. Peter's||Wexford||
|-
| Newtown||Ferns||Wexford||
|-
| Newtown||Monart||Wexford||
|-
| Newtown||Carrick||Wexford||
|-
| Newtown||Drumkay||Wicklow||
|-
| Newtown||Hollywood||Wicklow||
|-
| Newtown||Kilmacanoge||Wicklow||
|-
| Newtown||Mullinacuff||Wicklow||
|-
| Newtown||Donaghmore||Wicklow||
|-
| Newtown||Kilranelagh||Wicklow||
|-
| Newtown||Drumcannon||Waterford||
|-
| Newtown||Islandikane||Waterford||
|-
| Newtown||Kilmeadan||Waterford||
|-
| Newtownadam||Caher||Tipperary||
|-
| Newtownallen||Ballaghmoon||Kildare||
|-
| Newtown Anderson T.||Calry||Sligo||
|-
| Newtownanner Demesne||Kilsheelan||Tipperary||
|-
| Newtown Ards T.||Newtownards ||Down||
|-
| Newtownbabe||Ballybarrack||Louth||
|-
| Newtown (Baker)||Earlstown||Kilkenny||
|-
| Newtown or Ballyfallon||Athboy||Meath||
|-
| Newtown or Ballynoe||Ardoyne||Carlow||
|-
| Newtownbalregan||Castletown||Louth||
|-
| Newtown Baltracey||Tipper||Kildare||
|-
| Newtownbarry||St. Mary's Newtownbarry||Wexford||
|-
| Newtownbarry T.||St. Mary's Newtownbarry||Wexford||
|-
| Newtown Bellew T.||Moylough||Galway||
|-
| Newtownbert||Kilberry||Kildare||
|-
| Newtown Big||Kilcowan||Wexford||
|-
| Newtown Blackrock||Monkstown||Dublin||Dublin Barony
|-
| Newtown Blackrock||Monkstown||Dublin||Rathdown Barony
|-
| Newtownblake||Kilthomas||Galway||
|-
| Newtownbond||Killoe||Longford||
|-
| Newtownboswell||Killiskey||Wicklow||
|-
| Newtownbracklagh||Duniry||Galway||
|-
| Newtownbreda T.||Knockbreda||Down||
|-
| Newtownburke||Inishkeel||Donegal||
|-
| Newtown Butler T.||Galloon||Fermanagh||
|-
| Newtown Butler T.||Oranmore||Galway||
|-
| Newtown Carradoan||Killygarvan||Donegal||
|-
| Newtowncarrigans||Dunamon||Roscommon||
|-
| Newtown Castlebyrn||Monkstown||Dublin||
|-
| Newtowncliffony||Ahamlish||Sligo||
|-
| Newtownclonbun||Newtownclonbun||Meath||
|-
| Newtown or Cloneen||Killyon||Meath||
|-
| Newtown Commons||Greenoge||Meath||
|-
| Newtown or Commons||St. Mary's||Wexford||Bantry Barony
|-
| Newtowncorduff||Lusk||Dublin||
|-
| Newtown Crommelin T.||Newtown Crommelin||Antrim||
|-
| Newtowncunningham||Allsaints||Donegal||
|-
| Newtown Cunningham T.||Allsaints||Donegal||
|-
| Newtown (Darcy)||Dunmore||Galway||
|-
| Newtown (Darcy)||Tuam||Galway||
|-
| Newtowndarver||Darver||Louth||
|-
| Newtown Dillon T.||Kilbeagh||Mayo||
|-
| Newtowndonore||Downings||Kildare||
|-
| Newtowndrangan||Drangan||Tipperary||
|-
| Newtowndrumgornan||Killymard||Donegal||
|-
| Newtown East||Moyarta||Clare||
|-
| Newtowneyre||Kiltormer||Galway||
|-
| Newtownfane||Louth||Louth||
|-
| Newtown Farragher||Cloonygormican||Roscommon||
|-
| Newtownflanigan||Cashel||Longford||
|-
| Newtown Forbes T.||Clongesh||Longford||
|-
| Newtownfore||Aughnish||Donegal||
|-
| Newtown Girley||Girley||Meath||
|-
| Newtown (Glynn)||Kilmacduagh||Galway||
|-
| Newtowngore||Carrigallen||Leitrim||
|-
| Newtown Gore T.||Carrigallen||Leitrim||
|-
| Newtown Great||Rathmore||Kildare||
|-
| Newtowngrove or Grovehall||Kilmacrenan||Donegal||
|-
| Newtown (Guest)||Modreeny||Tipperary||
|-
| Newtownhamilton||Killea||Donegal||
|-
| Newtown Hamilton T.||Newtownhamilton||Armagh||
|-
| Newtown (Hodgins)||Modreeny||Tipperary||
|-
| Newtownhortland||Scullogestown||Kildare||
|-
| Newtownkelly||Clontuskert||Galway||
|-
| Newtown Kilcashel||Moore||Roscommon||
|-
| Newtown Kilcolgan||Kilcolgan||Galway||
|-
| Newtown Knockaleva||Mosstown||Louth||
|-
| Newtownlaragh||Kilcock||Kildare||
|-
| Newtown Limavady alias Rathbrady Beg||Drumachose||Derry||
|-
| Newtown Limavady T.||Drumachose||Derry||
|-
| Newtown Little||Kilgobbin||Dublin||
|-
| Newtown Little||Rathfarnham||Dublin||
|-
| Newtown Little||Rathmore||Kildare||
|-
| Newtown Little||Kilcowan ||Wexford||
|-
| Newtownlow||Newtown||Westmeath||
|-
| Newtown Lower||Saggart||Dublin||
|-
| Newtown Lower||Newtownlennan||Tipperary||
|-
| Newtown Lower||Inch||Wexford||
|-
| Newtown Lower||Tikillin||Wexford||
|-
| Newtownlynch||Kinvarradoorus||Galway||
|-
| Newtown (Lynott)||Dunmore||Galway||
|-
| Newtownmacabe||Taghadoe||Kildare||
|-
| Newtown Monasterboice||Monasterboice||Louth||
|-
| Newtownmoneenluggagh||Scullogestown||Kildare||
|-
| Newtownmountkennedy||Newcastle Upper||Wicklow||
|-
| Newtownmountkennedy T.||Newcastle Upper||Wicklow||
|-
| Newtownmoyaghy||Moyglare||Meath||
|-
| Newtownmoyaghy||Rodanstown||Meath||
|-
| Newtownmoynagh||Trim||Meath||
|-
| Newtown North||Shandrum||Cork||
|-
| Newtown North||Ballynakill||Galway||Leitrim Barony
|-
| Newtown North||Oola||Limerick||
|-
| Newtown North||Crossboyne||Mayo||
|-
| Newtown North||Donohill||Tipperary||
|-
| Newtownpark||Kill||Dublin||
|-
| Newtownpark||Rathmore||Kildare||
|-
| Newtown Park T.||Stillorgan||Dublin||
|-
| Newtownpilsworth||Dunmanoge||Kildare||
|-
| Newtownrathganley||Kilmore||Meath||
|-
| Newtown (Regan)||Kilmacduagh||Galway||
|-
| Newtown Sandes T.||Murher||Kerry||
|-
| Newtownsaunders||Baltinglass||Wicklow||
|-
| Newtown (Shea)||Earlstown||Kilkenny||
|-
| Newtown or Skirk||Skirk||Laois||
|-
| Newtown South||Shandrum||Cork||
|-
| Newtown South||Ballynakill||Galway||Leitrim Barony
|-
| Newtown South||Oola||Limerick||
|-
| Newtown South||Crossboyne||Mayo||
|-
| Newtown South||Donohill||Tipperary||
|-
| Newtown Springfield||Clondavaddog||Donegal||
|-
| Newtownstalaban||Beaulieu||Louth||
|-
| Newtownstalaban||Tullyallen||Louth||
|-
| Newtown Stewart||Ardstraw||Tyrone||
|-
| Newtown Stewart T.||Ardstraw||Tyrone||
|-
| Newtown T.||Shandrum||Cork||
|-
| Newtown T.||Seapatrick||Down||
|-
| Newtown T.||Lusmagh||Offaly||
|-
| Newtown Upper||Kilbroney||Down||
|-
| Newtown Upper||Saggart||Dublin||
|-
| Newtown Upper||Newtownlennan||Tipperary||
|-
| Newtown Upper||Inch||Wexford||Gorey Barony
|-
| Newtown Upper||Tikillin||Wexford||
|-
| Newtown Vevay T.||Bray||Wicklow||
|-
| Newtown West||Moyarta||Clare||
|-
| Newtownwhite||Ballysakeery||Mayo||
|-
| Newvillage||Rahoon||Galway||
|-
| Newvillage||Killian||Galway||
|-
| Newvillage||Kilcummin||Galway||
|-
| Niblock||Antrim||Antrim||
|-
| Nicharee||Duncormick||Wexford||
|-
| Nicholastown||Cloncurry||Kildare||
|-
| Nicholastown||Kilcullen||Kildare||
|-
| Nicholastown||Tankardstown||Kildare||
|-
| Nicholastown||Kilmenan||Kilkenny||
|-
| Nicholastown||Kilcolumb||Kilkenny||
|-
| Nicholastown||Pollrone||Kilkenny||
|-
| Nicholastown||Philipstown||Louth||
|-
| Nicholastown||Port||Louth||
|-
| Nicholastown||Derrygrath||Tipperary||
|-
| Nicholastown||Whitechurch||Waterford||
|-
| Nicholastown||Noughaval||Westmeath||
|-
| Nicholastown||Churchtown ||Westmeath||
|-
| Nicker||Grean||Limerick||
|-
| Nickeres||Emly||Tipperary||
|-
| Nicker T.||Grean||Limerick||
|-
| Ninch||Julianstown||Meath||
|-
| Nineacres||Annaghdown||Galway||
|-
| Nineacres||Carn||Wexford||
|-
| Ninemilehouse||Templemichael||Tipperary||
|-
| Ninemilehouse T.||Grangemockler||Tipperary||also in Templemichael parish.
|-
| Ninemilehouse T.||Templemichael||Tipperary||also in Grangemockler parish.
|-
| Nineteenacres||Carn||Wexford||
|-
| Noan||Graystown||Tipperary||
|-
| Noard||Twomileborris||Tipperary||
|-
| Nobber||Nobber||Meath||
|-
| Nobber T.||Nobber||Meath||
|-
| Nodstown||Ardmayle||Tipperary||
|-
| Nodstown North||Ardmayle||Tipperary||
|-
| Nodstown South||Ardmayle||Tipperary||
|-
| Noggusboy||Gallen||Offaly||
|-
| Noggusduff||Gallen||Offaly||
|-
| Noghan||Drumlane||Cavan||
|-
| Nohaval||Nohaval||Cork||
|-
| Nohavaldaly||Nohavaldaly||Cork||
|-
| Nohaval Lower||Nohavaldaly||Cork||
|-
| Nohaval North||Nohaval||Kerry||
|-
| Nohaval South||Nohaval||Kerry||
|-
| Nohaval T.||Nohaval||Cork||
|-
| Nohaval Upper||Nohavaldaly||Cork||
|-
| Nolagh||Shercock||Cavan||
|-
| Nonsuch||Mayne||Westmeath||
|-
| Nooaff East||Drumcliff||Clare||
|-
| Nooaff West||Drumcliff||Clare||
|-
| Nooan||Killinaboy||Clare||
|-
| Nooan||Ruan||Clare||
|-
| Nook||Clones||Monaghan||
|-
| Nook||St. James & Dunbrody||Wexford||
|-
| Norbrinstown or Normanstown||Kells||Meath||
|-
| Normangrove||Killinny||Galway||
|-
| Normansgrove||Dunboyne||Meath||
|-
| Normanstown or Norbrinstown||Kells||Meath||
|-
| Norrira||Clonca||Donegal||
|-
| Norrisland||Lismore and Mocollop||Waterford||
|-
| Norrismount||Toome||Wexford||
|-
| Norristown||Kilmannan||Wexford||
|-
| Northampton||Kinvarradoorus||Galway||
|-
| Northbrook||Aughrim||Galway||
|-
| North Bull Islands||Raheny||Dublin||
|-
| North Bull or The Island||Clontarf||Dublin||
|-
| North East Division||Carrickfergus||Antrim||
|-
| Northgrove||Offerlane||Laois||
|-
| North Island||Moyrus||Galway||
|-
| North & South Lislea||Bodoney Upper||Tyrone||
|-
| Northyard||Bumlin||Roscommon||
|-
| Noughaval||Doora||Clare||
|-
| Noughaval||Noughaval||Clare||
|-
| Noughaval||Noughaval||Westmeath||
|-
| Novally||Ramoan||Antrim||
|-
| Nugentstown||Balrathboyne||Meath||
|-
| Nunsacre||Clonfert||Galway||
|-
| Nuns Island||Bunown||Westmeath||
|-
| Nunsland||Rathmore||Kildare||
|-
| Nun's Quarter||Inishargy||Down||
|-
| Nunstown||Aghadoe||Kerry||
|-
| Nurchossy Irish||Clogher||Tyrone||
|-
| Nurchossy Scotch||Clogher||Tyrone||
|-
| Nure||Killasnet||Leitrim||
|-
| Nure||Ardagh||Mayo||
|-
| Nure Beg||Killanny||Monaghan||
|-
| Nure Beg||Magheracloone||Monaghan||
|-
| Nure or Lilliput||Dysart||Westmeath||
|-
| Nure More||Killanny||Monaghan||
|-
| Nure More||Magheracloone||Monaghan||
|-
| Nurney||Agha||Carlow||
|-
| Nurney||Nurney||Carlow||
|-
| Nurney ||Nurney||Kildare||Carbury Barony
|-
| Nurney||Nurney||Kildare||Offaly West Barony
|-
| Nurney Bog||Nurney||Kildare||Offaly West Barony
|-
| Nurney Demesne||Nurney||Kildare||Offaly West Barony
|-
| Nurney T.||Nurney||Carlow||
|-
| Nurney T.||Nurney ||Kildare||Offaly West Barony
|-
| Nurserypark or Corrabaun||Monivea||Galway||
|-
| Nursetown Beg||Kilshannig||Cork||
|-
| Nursetown More||Kilshannig||Cork||
|-
| Nutfield||Drung||Cavan||
|-
| Nutfield||Templemaley||Clare||
|-
| Nutfield||Aghavea||Fermanagh||
|-
| Nutgrove||Rosenallis||Laois||
|-
| Nutgrove or Feebrack||Tynagh||Galway||
|-
| Nut Island||Lickmolassy||Galway||
|-
| Nut Island||Cashel ||Longford||
|-
| Nutstown||Ballymadun||Dublin||
|-
| Nutgrove||Kilgullane||Cork||
|-
| Nuttstown||Kilbride||Meath||Dunboyne Barony
|-
| Nymphhall||Killea||Waterford||
|-
| Nymphsfield||Cong||Mayo||
|-
| Nyra||Rosenallis||Laois||
|-
| Oaghmonicroy||Bodoney Lower||Tyrone||
|-
| Oakfield||Kiltenanlea||Clare||
|-
| Oakfield||Cleenish||Fermanagh||
|-
| Oakfield||Cloonfinlough||Roscommon||
|-
| Oakfield Demesne||Raphoe||Donegal||
|-
| Oakfield or Derrydarragh||St. John's||Sligo||
|-
| Oakfield or Gortnandarragh||Killannin||Galway||
|-
| Oakhampton||Kilnarath||Tipperary||
|-
| Oaklands||Kildress||Tyrone||
|-
| Oaklands||St. Mary's||Wexford||Bantry Barony
|-
| Oakleypark||Kildrought||Kildare||
|-
| Oakleypark||Seirkieran||Offaly||
|-
| Oakleypark or Lawrencetown||Dulane||Meath||
|-
| Oakpark or Painestown||Painestown||Carlow||
|-
| Oakport Demesne||Ardcarn||Roscommon||
|-
| Oakstown||Trim||Meath||
|-
| Oaktate||Louth||Louth||
|-
| Oakwood||Hollywood||Wicklow||
|-
| Oakwood or Drummully||Castleterra||Cavan||
|-
| Oakwood North||Abbeyknockmoy||Galway||
|-
| Oakwood South||Abbeyknockmoy||Galway||
|-
| Oatencake||Mogeesha||Cork||
|-
| Oatfield||Clonlea||Clare||
|-
| Oatfield||Aughrim||Galway||
|-
| Oatlands||Cahervally||Limerick||
|-
| Oberstown||Lusk||Dublin||
|-
| Oberstown||Shanlis||Louth||
|-
| Obertstown||Skreen||Meath||
|-
| O'Briensbridge||O'Briensbridge||Clare||
|-
| O'Briensbridge T.||O'Briensbridge||Clare||
|-
| Obrienscastle||Inchicronan||Clare||
|-
| O'Callaghansmills T.||Killuran||Clare||
|-
| Ockanaroe||Clonenagh & Clonagheen||Laois||
|-
| Odagh||Odagh||Kilkenny||
|-
| Oddacres||Rahoon||Galway||
|-
| Odder||Tara||Meath||
|-
| O'Donnell's Island||Donegal||Donegal||
|-
| O'Donnell's Island or Illaunbeg||Killadysert||Clare||
|-
| Oggal||Killinagh||Cavan||
|-
| Ogham||Kilturra||Sligo||
|-
| Ogham||Tawnagh||Sligo||
|-
| Oghambaun||Achonry||Sligo||
|-
| Ogherbeg||Killymard||Donegal||
|-
| Oghermong||Caher||Kerry||
|-
| Oghery||Moycullen||Galway||
|-
| Oghil||Monasterevin||Kildare||
|-
| Oghil||Killoe||Longford||
|-
| Oghil||Kilglass||Sligo||
|-
| Oghil Beg||Clonfert||Galway||
|-
| Oghill||Ballintemple||Cavan||
|-
| Oghill||Tullyfern||Donegal||
|-
| Oghill||Drumkeeran||Fermanagh||
|-
| Oghill||Trory||Fermanagh||
|-
| Oghill||Aghalurcher||Fermanagh||
|-
| Oghill||Inishmore||Galway||
|-
| Oghill||Mohill||Leitrim||
|-
| Oghill||Tamlaght Finlagan||Derry||
|-
| Oghill||Cumber Lower||Derry||
|-
| Oghill||Clontibret||Monaghan||
|-
| Oghill||Donaghmoyne||Monaghan||
|-
| Oghill||Ballyclog||Tyrone||
|-
| Oghillees||Burrishoole||Mayo||
|-
| Oghillicartan||Drumkeeran||Fermanagh||
|-
| Oghil Lower||Redcross||Wicklow||
|-
| Oghilly||Ballynakill||Galway||Leitrim Barony
|-
| Oghil More||Clonfert||Galway||
|-
| Oghil Upper||Redcross||Wicklow||
|-
| Oghly Island||Moyrus||Galway||
|-
| O'Grady's Island or Inishoul||Killadysert||Clare||
|-
| Ogulla||Ogulla||Roscommon||
|-
| Oilgate or Mullinnagore||Edermine||Wexford||
|-
| Oilgate T.||Edermine||Wexford||
|-
| Okyle||Lismore and Mocollop||Waterford||
|-
| Oldabbey||Inishkenny||Cork||
|-
| Oldabbey||Robertstown||Limerick||
|-
| Old Barr||Devenish||Fermanagh||
|-
| Oldbawn||Tallaght||Dublin||
|-
| Oldboley||Taghmon||Wexford||
|-
| Oldboleys||Powerscourt||Wicklow||
|-
| Oldborris||Offerlane||Laois||
|-
| Oldbridge||Donore||Meath||
|-
| Oldbridge||St. Mary's Clonmel||Waterford||
|-
| Oldcamp||Kyle||Laois||
|-
| Oldcarton||Laraghbryan||Kildare||
|-
| Oldcastle||Magourney||Cork||
|-
| Oldcastle||Kilconierin||Galway||
|-
| Oldcastle||Meelick||Mayo||
|-
| Oldcastle||Oldcastle||Meath||
|-
| Oldcastle||Bourney||Tipperary||
|-
| Oldcastle||Toem||Tipperary||
|-
| Oldcastle||Newtownlennan||Tipperary||
|-
| Oldcastle Lower||Killamery||Kilkenny||
|-
| Oldcastletown||Kildorrery||Cork||
|-
| Oldcastle T.||Oldcastle||Meath||
|-
| Oldcastle Upper||Killamery||Kilkenny||
|-
| Old Church||Tickmacrevan||Antrim||
|-
| Old Church Glebe||Kilcar||Donegal||
|-
| Old Church Yard||Termonmaguirk||Tyrone||
|-
| Oldconnaught||Oldconnaught||Dublin||
|-
| Oldconnell||Oldconnell||Kildare||
|-
| Oldcourt||Clonmel||Cork||
|-
| Oldcourt||Templebodan||Cork||
|-
| Oldcourt||Carrigaline||Cork||
|-
| Oldcourt||Doneraile||Cork||
|-
| Oldcourt||Ringrone||Cork||
|-
| Oldcourt||Creagh||Cork||
|-
| Oldcourt||Tallaght||Dublin||
|-
| Oldcourt||Kilmore||Kildare||
|-
| Oldcourt||Kilberry||Kildare||
|-
| Oldcourt||Clonamery||Kilkenny||
|-
| Oldcourt||Fiddown||Kilkenny||
|-
| Oldcourt||Croagh||Limerick||
|-
| Oldcourt||Killabban||Laois||
|-
| Oldcourt||Finnoe||Tipperary||
|-
| Oldcourt||Adamstown||Wexford||
|-
| Oldcourt||Whitechurch||Wexford||
|-
| Oldcourt||Blessington||Wicklow||
|-
| Oldcourt||Bray||Wicklow||
|-
| Oldcourt||Rathsallagh||Wicklow||
|-
| Oldcourt East||Templenacarriga||Cork||
|-
| Oldcourt West||Templenacarriga||Cork||
|-
| Oldcroghan||Croghan||Offaly||
|-
| Oldderrig||Killeshin||Laois||
|-
| Oldforge||Drumbeg||Antrim||
|-
| Oldforge||Killarney||Kerry||
|-
| Old-fort||Ringrone||Cork||
|-
| Old Freehold||Kilwaughter||Antrim||
|-
| Oldglass||Aghaboe||Laois||
|-
| Oldglass||Bordwell||Laois||
|-
| Old Glebe or Cartron||Kilgefin||Roscommon||
|-
| Oldgraigue||Moyglare||Meath||
|-
| Oldgrange||Fontstown||Kildare||
|-
| Oldgrange||Narraghmore||Kildare||
|-
| Oldgrange||Monasterevin||Kildare||
|-
| Oldgrange||Graiguenamanagh||Kilkenny||
|-
| Oldgrange||Easky||Sligo||
|-
| Oldgrange||Tullaghmelan||Tipperary||
|-
| Oldgrange||Mothel||Waterford||
|-
| Oldhall||Mulrankin||Wexford||
|-
| Oldhead||Kilgeever||Mayo||
|-
| Oldhead or Downmacpatrick||Ringrone||Cork||
|-
| Oldkilcullen||Kilcullen||Kildare||
|-
| Oldleagh||Killabban||Laois||
|-
| Oldleighlin||Oldleighlin||Carlow||
|-
| Oldleighlin T.||Oldleighlin||Carlow||
|-
| Oldmill||Dysartenos||Laois||
|-
| Oldmill||Kilrane||Wexford||
|-
| Old Mills T.||Carncastle||Antrim||
|-
| Oldmilltown||Kilteel||Kildare||
|-
| Oldorchard||Rathfarnham||Dublin||
|-
| Oldpaddocks||Blessington||Wicklow||
|-
| Old Park||Shankill||Antrim||
|-
| Oldpark||St. Canice||Kilkenny||
|-
| Oldrock or Shancarrigeen||Cloonoghil||Sligo||
|-
| Oldstone||Muckamore (Grange of)||Antrim||
|-
| Oldstreet||Kilquain||Galway||
|-
| Oldtown||Ballyrashane||Antrim||
|-
| Oldtown||Ballyellin||Carlow||
|-
| Oldtown||Nurney||Carlow||
|-
| Oldtown||Clonmore||Carlow||
|-
| Oldtown||Kineagh||Carlow||
|-
| Oldtown||Leck||Donegal||
|-
| Oldtown||Clonmethan||Dublin||
|-
| Oldtown||Artaine||Dublin||
|-
| Oldtown||Coolock||Dublin||
|-
| Oldtown||Swords||Dublin||
|-
| Oldtown||Greatconnell||Kildare||
|-
| Oldtown||Naas||Kildare||
|-
| Oldtown||Killashee||Kildare||
|-
| Oldtown||Kildrought||Kildare||
|-
| Oldtown||Kilteel||Kildare||
|-
| Oldtown||Tullaroan||Kilkenny||
|-
| Oldtown||Grangemaccomb||Kilkenny||
|-
| Oldtown||Jerpointchurch||Kilkenny||
|-
| Oldtown||Burnchurch||Kilkenny||
|-
| Oldtown||Rahan||Offaly||
|-
| Oldtown||Killaderry||Offaly||
|-
| Oldtown||Ardagh||Longford||
|-
| Oldtown||Martry||Meath||
|-
| Oldtown||Kilcarn||Meath||
|-
| Oldtown||Gallow||Meath||
|-
| Oldtown||Rathcore||Meath||
|-
| Oldtown||Rathsaran||Laois||
|-
| Oldtown||Aghmacart||Laois||
|-
| Oldtown||Clonenagh and Clonagheen||Laois||
|-
| Oldtown||Kilmacumsy||Roscommon||
|-
| Oldtown||Templemore||Tipperary||
|-
| Oldtown||Castlelost||Westmeath||
|-
| Oldtown||Donaghmore||Wexford||
|-
| Oldtown||Tomhaggard||Wexford||
|-
| Oldtown||Ardcolm||Wexford||
|-
| Oldtown||Ballynure||Wicklow||
|-
| Oldtown (Bennett)||Hospital||Limerick||
|-
| Oldtown or Cornagleragh||Annagelliff||Cavan||
|-
| Oldtown Curralane||Kilrush||Wexford||
|-
| Old Town Deer Park||Ballyscullion||Derry||
|-
| Oldtown Demesne||Naas||Kildare||
|-
| Oldtowndonore||Downings||Kildare||
|-
| Old Town Downing||Ballyscullion||Derry||
|-
| Oldtownhill||Tullaroan||Kilkenny||
|-
| Oldtown Kilcashel||Moore||Roscommon||
|-
| Oldtown or Puddingstreet||Drumraney||Westmeath||
|-
| Oldtown (Ryan)||Hospital||Limerick||
|-
| Oldtown T.||Clonmethan||Dublin||
|-
| Oldtully||Oldcastle||Meath||
|-
| Old Warren||Blaris||Antrim||
|-
| Ollatrim||Aghnameadle||Tipperary||
|-
| Oltore||Donaghpatrick||Galway||
|-
| Omagh||Drumragh||Tyrone||
|-
| Omagh T.||Drumragh||Tyrone||
|-
| Omard||Ballymachugh||Cavan||
|-
| Omaun Beg||Killererin||Galway||
|-
| Omaun More||Killererin||Galway||
|-
| O'Meara's Acres||Kilbarron||Tipperary||
|-
| Omey Island, Cartoorbeg||Omey||Galway||
|-
| Omey Island, Cloon||Omey||Galway||
|-
| Omey Island, Gooreenatinny||Omey||Galway||
|-
| Omey Island, Sturrakeen||Omey||Galway||
|-
| Omey Island, Gooreen||Omey||Galway||
|-
| Omoresforest||Clonenagh and Clonagheen||Laois||
|-
| Onagh||Taghmaconnell||Roscommon||
|-
| Onagh||Powerscourt||Wicklow||
|-
| Onaght||Inishmore||Galway||
|-
| Ongenstown||Ardbraccan||Meath||
|-
| Ongenstown||Duleek||Meath||
|-
| Onomy||Muckno||Monaghan||
|-
| Ooankeagh||Ruan||Clare||
|-
| Oolagh East||Knockane||Kerry||
|-
| Oolagh West||Knockane||Kerry||
|-
| Oolahills East||Oola||Limerick||
|-
| Oolahills West||Oola||Limerick||
|-
| Oola T.||Oola||Limerick||
|-
| Oorid||Kilcummin||Galway||
|-
| Oorla||Robertstown||Limerick||
|-
| Oort||Culdaff||Donegal||
|-
| Oory||Tagheen||Mayo||
|-
| Ora Beg||Cleenish||Fermanagh||
|-
| Oram||Muckno||Monaghan||
|-
| Oran ||Oran||Roscommon||
|-
| Oran Beg||Oranmore||Galway||
|-
| Oranhill||Oranmore||Galway||
|-
| Oranhill||Rahoon||Galway||
|-
| Oran More||Oranmore||Galway||
|-
| Oranmore T.||Oranmore||Galway||
|-
| Oranstown||Dunboyne||Meath||
|-
| Orchard||Nurney||Carlow||
|-
| Orchard||Moyacomb||Carlow||
|-
| Orchard Island||Ardcarn ||Roscommon||
|-
| Orchard Lower||Fossy or Timahoe||Laois||
|-
| Orchardstown||Kilmacleague||Waterford||
|-
| Orchardstown||Kilburne||Waterford||
|-
| Orchardstown East||Newchapel||Tipperary||
|-
| Orchardstown West||Newchapel||Tipperary||
|-
| Orchard Upper||Fossy or Timahoe||Laois||
|-
| Ordnance Ground||Kilcummin||Galway||
|-
| O'Reilly's Island||Kilronan||Roscommon||
|-
| Ories||Kilcleagh||Westmeath||
|-
| Orinish Island||Inishkeel||Donegal||
|-
| Oristown||Clongill||Meath||
|-
| Oristown||Teltown ||Meath||
|-
| Oristown T.||Teltown||Meath||
|-
| Oritor||Kildress||Tyrone||
|-
| Orkneys||Bourney||Tipperary||
|-
| Orlagh||Cruagh||Dublin||
|-
| Orlock||Bangor||Down||
|-
| Ormond's Island||Tuosist||Kerry||
|-
| Oro More or Tullybrack||Cleenish||Fermanagh||
|-
| Orristown||Kilmacree||Wexford||
|-
| Orthon's Island||Kilcaskan||Cork||
|-
| Osberstown||Naas||Kildare||
|-
| O'Shea's Acres||Kilseily||Clare||
|-
| Osierbrook||Seirkieran||Offaly||
|-
| Ossoryhill||Kilderry||Kilkenny||
|-
| Otter Island||Annaduff||Leitrim||
|-
| Otters Island||Lickmolassy||Galway||
|-
| Otterstown||Athboy||Meath||
|-
| Oughaval||Stradbally||Laois||
|-
| Oughaval||Kilmacteige||Sligo||
|-
| Oughtagh||Ballynakill||Galway||Ballymoe Barony
|-
| Oughtagh||Kilbegnet||Galway||
|-
| Oughtagh||Cumber Lower||Derry||
|-
| Oughtagh||Templemore||Mayo||
|-
| Oughtagorey||Rossinver||Sligo||
|-
| Oughtboy||Bodoney Upper||Tyrone||
|-
| Oughtcarn||Templecarn||Donegal||
|-
| Oughtdarra||Killilagh||Clare||
|-
| Oughtdoorish||Bodoney Upper||Tyrone||
|-
| Oughter||Lemanaghan||Offaly||
|-
| Oughteragh||Oughteragh||Leitrim||
|-
| Oughterard||Kilballyowen||Clare||
|-
| Oughterard||Oughterard||Kildare||
|-
| Oughterard||Desertcreat||Tyrone||
|-
| Oughterard||Dromore||Tyrone||
|-
| Oughterard or Caurans Upper||Turlough||Mayo||
|-
| Oughterard T.||Kilcummin||Galway||
|-
| Oughterdrum||Belleek||Fermanagh||
|-
| Oughterlin||Killygarvan||Donegal||
|-
| Oughtihery||Aghabulloge||Cork||
|-
| Oughtiv||Dromod||Kerry||
|-
| Oughtmama||Oughtmama||Clare||
|-
| Oughtmame||Bodoney Upper||Tyrone||
|-
| Oughtmeen||Templecrone||Donegal||
|-
| Oughtminnee||Kilmoe||Cork||
|-
| Oughtnadrin||Drumhome||Donegal||
|-
| Oughtnadrin Barr, Tullygallen, and Tullywee||Drumhome||Donegal||
|-
| Oughtnamwella||Bodoney Upper||Tyrone||
|-
| Oughtohig||Kilcoe||Cork||
|-
| Oughty||Oughaval||Mayo||
|-
| Oughtymore||Magilligan||Derry||
|-
| Oughtymoyle||Magilligan||Derry||
|-
| Oulart||Meelnagh||Wexford||
|-
| Oulart||Kilnenor||Wexford||
|-
| Oulartard||Clone||Wexford||
|-
| Oulartleigh||Ballyhuskard||Wexford||
|-
| Oulart T.||Meelnagh||Wexford||
|-
| Oulartwick Beg||Kilcormick||Wexford||
|-
| Oulartwick More||Kilcormick||Wexford||
|-
| Ouley||Castleterra||Cavan||
|-
| Ouley||Saintfield||Down||
|-
| Ouley||Newry||Down||
|-
| Oultauns||Kilcommon||Mayo||Kilmaine Barony
|-
| Oultort||Lickmolassy||Galway||
|-
| Ouna or Eagle Hill||Layd||Antrim||
|-
| Ounagh||Kilmacteige||Sligo||
|-
| Ouragh||Tullowphelim||Carlow||
|-
| Ouris||Dunkerrin ||Offaly||
|-
| Outal||Grange of Dundermot||Antrim||
|-
| Outeragh||Outeragh||Tipperary||
|-
| Outhill||Ballyrashane||Antrim||
|-
| Outlack||Lisnadill||Armagh||
|-
| Outlands||Swords||Dublin||
|-
| Outlands of Grevally||Donaghenry||Tyrone||
|-
| Outleckan||Ballymyre||Armagh||
|-
| Outrath||Outrath||Kilkenny||
|-
| Ouvry||Magheross||Monaghan||
|-
| Ovaun||Shankill||Roscommon||
|-
| Ovenstown||Earlstown||Kilkenny||
|-
| Ovidstown||Cloncurry||Kildare||
|-
| Ovidstown||Straffan||Kildare||
|-
| Ovidstown||Taghadoe||Kildare||
|-
| Ovil||Dungiven||Derry||
|-
| Owenanirragh||Kilcommon||Mayo||Erris Barony
|-
| Owenavaddy or Riverstick||Killaan||Galway||
|-
| Owenbeg||Dungiven||Derry||
|-
| Owenbeg||Easky||Sligo||
|-
| Owenboy||Killymard||Donegal||
|-
| Owenboy||Fahan Lower||Donegal||
|-
| Owenboy||Crossmolina||Mayo||
|-
| Owenbreedin||Aghavea||Fermanagh||
|-
| Owenbristy||Ardrahan||Galway||
|-
| Owencam||Templeport||Cavan||
|-
| Owencloghy||Tickmacrevan||Antrim||
|-
| Owenduff||Achill||Mayo||
|-
| Owenduff||Kilcommon||Mayo||Erris Barony
|-
| Owengallees||Templeport||Cavan||
|-
| Owenglass||Kilcommon||Mayo||Erris Barony
|-
| Owenkillew and Barnahone||Fahan Lower||Donegal||
|-
| Owennagadragh||Donaghmore||Donegal||
|-
| Owenreagh||Ballynascreen||Derry||
|-
| Owenreagh||Leckpatrick||Tyrone||
|-
| Owen's & Bigg's-Lot||St. John Baptist||Tipperary||
|-
| Owen's Island||Kilcrohane||Cork||
|-
| Owenskerry||Aghalurcher||Fermanagh||
|-
| Owensland||Kilbride||Antrim||
|-
| Owenstown||Moyglare||Meath||
|-
| Owenstown||Rathmacknee||Wexford||
|-
| Owenstown or Trimleston||Taney||Dublin||
|-
| Owenteskiny||Inishkeel||Donegal||
|-
| Owenwee||Oughaval||Mayo||
|-
| Owenykeevan or Tawnamaddoo||Easky||Sligo||
|-
| Ower||Killursa||Galway||
|-
| Ower||Killannin||Galway||
|-
| Owey Island||Templecrone||Donegal||
|-
| Owlbeg||Clonygoose||Carlow||
|-
| Owl Island||Inishmacsaint||Fermanagh||
|-
| Ownagarry||Killorglin||Kerry||
|-
| Owning||Owning||Kilkenny||
|-
| Oxford||Killedan||Mayo||
|-
| Oxgrove||Killimorbologue||Galway||
|-
| Ox Island||Inishbofin||Mayo||
|-
| Oxpark||Modreeny||Tipperary||
|-
| Oxtown||Termonmaguirk||Tyrone||
|-
| Oysterhaven||Kilmonoge||Cork||
|-
| Oyster Island||Killaspugbrone||Sligo||
|-
|
|}
[[Category:Irish Townlands]]
