| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
1901  | Ardara  Ard an Ratha,Ard an Rátha,Ardara,Ardarn | Ireland, Ulster Donegal | populated place population 732 | N 54° 45′ 52'' | W 8° 24′ 27'' |
1902  | Ardakillin Lough Ardakillen Lough,Ardakillin Lough | Ireland, Connacht County Roscommon | lake | N 53° 45′ 0'' | W 8° 11′ 0'' |
| 1903 | Ardagh Arda,Ardaca,Ardach,Ardachadh,Ardagh,Арда | Ireland, Leinster Co Longford | populated place | N 53° 40′ 0'' | W 7° 42′ 0'' |
1904  | Aran Island Arainn Mhor,Aran Island,Arranmor,Arranmore,Árainn Mhór | Ireland, Ulster Donegal | island | N 54° 59′ 29'' | W 8° 31′ 31'' |
| 1905 | Lough Anure Loch an Iuir,Loch an Iúir,Lough Anure | Ireland, Ulster Donegal | lake | N 54° 59′ 37'' | W 8° 17′ 0'' |
| 1906 | Annestown Annestown,Bun Abha | Ireland, Munster Waterford | populated place | N 52° 8′ 17'' | W 7° 18′ 16'' |
| 1907 | Annamoe Aah ny Mooa,Annamo,Annamoe,Ath na mBo,Áth na mBó,Аннамо | Ireland, Leinster County Wicklow | populated place | N 53° 1′ 44'' | W 6° 15′ 7'' |
| 1908 | Annagh Hill Annagh Hill,Cnoc an Eanaigh | Ireland, Leinster County Wexford | mountain elevation 454m | N 52° 45′ 8'' | W 6° 22′ 17'' |
| 1909 | Annaghdown Annadaun,Annaghdown,Eanach Dhuin,Eanach Dhúin,anadauni,Аннадаун,ანადაუნი | Ireland, Connacht Galway | populated place population 234 | N 53° 23′ 33'' | W 9° 3′ 59'' |
| 1910 | Annagassan Annagassan,Ath na gCasan,Áth na gCasán | Ireland, Leinster Louth | populated place population 201 | N 53° 53′ 10'' | W 6° 20′ 40'' |
| 1911 | Annagary Anagaire,Annagary | Ireland, Ulster Donegal | populated place population 236 | N 55° 1′ 19'' | W 8° 19′ 4'' |
| 1912 | Slieve Anierin Sliabh an Iarainn,Slieve Anierin | Ireland, Connacht Leitrim | mountain elevation 585m | N 54° 5′ 32'' | W 7° 58′ 23'' |
| 1913 | Allihies Allihies,Allikhis,Na hAilichi,Na hAilichí,alyhys,ariizu,Аллихис,الیهیس,アリイーズ | Ireland, Munster Cork | populated place | N 51° 38′ 0'' | W 10° 2′ 0'' |
| 1914 | Glen of Aherlow Glen of Aherlow | Ireland, Munster County Tipperary | valley | N 52° 25′ 1'' | W 8° 8′ 40'' |
| 1915 | Aherla Aherla,Akherla,An Eatharla,ahrla,Ахерла,اهرلا,اہرلا | Ireland, Munster Cork | populated place population 571 | N 51° 51′ 14'' | W 8° 43′ 56'' |
| 1916 | Ahascragh Ahascragh,Ath Eascrach,Áth Eascrach | Ireland, Connacht Galway | populated place population 195 | N 53° 23′ 44'' | W 8° 19′ 46'' |
| 1917 | Ahakista Ahakista,Akhakista,Ath an Chiste,Atha an Chiste,ahkysta,Áth an Chiste,Átha an Chiste,Ахакиста,اهکیست... | Ireland, Munster Cork | populated place | N 51° 36′ 20'' | W 9° 38′ 9'' |
| 1918 | Aglish Aglish,An Eaglais,aglysh,Аглиш,اگلیش | Ireland, Munster Waterford | populated place population 333 | N 52° 4′ 8'' | W 7° 49′ 39'' |
| 1919 | Aghavannagh Achadh Mheanach,Achadh Mheánach,Aghavannagh,Aghavannah,Akhavannakh,Ахаваннах | Ireland, Leinster County Wicklow | populated place | N 52° 54′ 51'' | W 6° 25′ 1'' |
| 1920 | Aghamore Achadh Mor,Achadh Mór,Aghamore,Akhamor,akhamori,aqamwr,Ахамор,اقامور,ახამორი | Ireland, Connacht Leitrim | populated place | N 53° 54′ 3'' | W 7° 57′ 39'' |
| 1921 | Adrigole Adrigol,Adrigole,Eadargoil,Eadargóil,Адригол,Адриголе | Ireland, Munster Cork | populated place population 452 | N 51° 41′ 38'' | W 9° 43′ 16'' |
| 1922 | Lough Adoon Loch an Duin,Loch an Dúin,Lough Adoon | Ireland, Munster Co Kerry | lake | N 52° 11′ 55'' | W 10° 9′ 11'' |
| 1923 | Adamstown Adamstown,Maigh Arnai,Maigh Arnaighe,Maigh Arnaí | Ireland, Leinster County Wexford | populated place population 258 | N 52° 23′ 39'' | W 6° 43′ 1'' |
| 1924 | Aclare Aclare,Ath an Chlair,Áth an Chláir | Ireland, Connacht County Sligo | populated place | N 54° 2′ 0'' | W 8° 54′ 0'' |
| 1925 | Achillbeg Island Acaill Bheag,Achillbeg,Achillbeg Island | Ireland, Connacht County Mayo | island | N 53° 51′ 52'' | W 9° 57′ 7'' |
| 1926 | Abbeyside Abbeyside,Abbisajd,Dun na Mainistreach,Dún na Mainistreach,abysayd,Аббисайд,Аббісайд,אביסייד,آبيسايد | Ireland, Munster Waterford | populated place | N 52° 5′ 38'' | W 7° 36′ 41'' |
| 1927 | Abbeyshrule Abbeyshrule,Abbishrul,Mainistir Shruthla,abyshrwl,Аббишрул,Аббішрул,ابیشرول | Ireland, Leinster Co Longford | populated place population 200 | N 53° 35′ 0'' | W 7° 39′ 0'' |
| 1928 | Abbeylara Abbeylara,Abbilara,Mainistir Leathratha,Mainistir Leathrátha,abylara,Аббилара,Аббілара,ابیلارا | Ireland, Leinster Co Longford | populated place | N 53° 46′ 0'' | W 7° 27′ 0'' |
| 1929 | Abbeydorney Abbeydorney,Abbidorni,Abejdornej,Mainistir O d'Torna,Mainistir O dTorna,Mainistir Ó dTorna,Mainistir... | Ireland, Munster Co Kerry | populated place population 418 | N 52° 21′ 0'' | W 9° 41′ 0'' |
| 1930 | Dromore West An Droim Mor Thiar,An Droim Mór Thiar,Dromor-Uehst,Dromore,Dromore West,Дромор-Уэст,დრომორ უესტი,ドロモ... | Ireland, Connacht County Sligo | populated place population 227 | N 54° 14′ 58'' | W 8° 52′ 42'' |
| 1931 | Yellow Furze An Aitinn Bhui,An Aitinn Bhuí,Yellow Furze,ylw frdy,یلو فرضی | Ireland, Leinster Meath | populated place | N 53° 40′ 24'' | W 6° 34′ 18'' |
| 1932 | Woodford An Chraig,An Chráig,An Ghraig,An Ghráig,Woodford | Ireland, Connacht Galway | populated place population 239 | N 53° 2′ 54'' | W 8° 24′ 1'' |
| 1933 | Woodenbridge Vudenbridzh,Woodenbridge,an Droichead Adhmaid,Вуденбридж | Ireland, Leinster County Wicklow | populated place | N 52° 49′ 56'' | W 6° 14′ 11'' |
| 1934 | Windgap Bearna na Gaoithe,Bearra na Gaoithe,Windgap | Ireland, Leinster County Kilkenny | populated place | N 52° 27′ 43'' | W 7° 23′ 49'' |
| 1935 | Williamstown Baile Liam,Baile Uilliam | Ireland, Connacht Galway | populated place population 148 | N 53° 40′ 35'' | W 8° 34′ 44'' |
| 1936 | Wicklow Head Wicklow Head | Ireland, Leinster County Wicklow | cape | N 52° 57′ 57'' | W 5° 59′ 53'' |
| 1937 | Wicklow Gap Wicklow Gap | Ireland, Leinster County Wicklow | gap | N 53° 2′ 26'' | W 6° 24′ 7'' |
| 1938 | Paulstown Baile Phoil,Baile Phóil,Paulstown,Polstaun,Whitehall,Полстаун | Ireland, Leinster County Kilkenny | populated place population 791 | N 52° 40′ 52'' | W 7° 1′ 20'' |
| 1939 | Whitegate An Geata Ban,An Geata Bán,Whitegate | Ireland, Munster Clare | populated place population 168 | N 52° 56′ 57'' | W 8° 22′ 17'' |
| 1940 | Whiddy Island Whiddy Island | Ireland, Munster Cork | island | N 51° 41′ 26'' | W 9° 30′ 4'' |
| 1941 | Wellingtonbridge Droichead Eoi,Wellington Bridge,Wellingtonbridge | Ireland, Leinster County Wexford | populated place | N 52° 15′ 48'' | W 6° 46′ 42'' |
| 1942 | Waterville An Coirean,An Coireán,Uotervill,Waterville,Waterville-Spunkane,uotabiru,wo te wei er,Уотервилл,ウォーター... | Ireland, Munster Co Kerry | populated place population 462 | N 51° 50′ 0'' | W 10° 10′ 0'' |
| 1943 | Waterfall Tobar an Iarla ,Waterfall | Ireland, Munster Cork | populated place | N 51° 51′ 34'' | W 8° 33′ 33'' |
| 1944 | Watch House Village Uotch-Khaus-Villidzh,Watch House,Watch House Village,Уотч-Хаус-Виллидж | Ireland, Leinster County Wexford | populated place | N 52° 41′ 27'' | W 6° 38′ 23'' |
| 1945 | War Hill War Hill | Ireland, Leinster County Wicklow | mountain elevation 685m | N 53° 8′ 23'' | W 6° 15′ 14'' |
| 1946 | Hill of Ward Hill of Ward,Tlachta | Ireland, Leinster Meath | hill | N 53° 37′ 28'' | W 6° 53′ 10'' |
| 1947 | Walshpool Lough Walshpool Lough,Washpool Lough | Ireland, Connacht County Mayo | lake | N 53° 48′ 0'' | W 9° 11′ 12'' |
| 1948 | Vinegar Hill Vinegar Hill | Ireland, Leinster County Wexford | hill | N 52° 30′ 8'' | W 6° 32′ 51'' |
| 1949 | Villierstown An Baile Nua,Villierstaun,Villierstown,vuiriasutaun,Виллиерстаун,ヴィリアスタウン | Ireland, Munster Waterford | populated place population 279 | N 52° 5′ 20'' | W 7° 51′ 11'' |
| 1950 | Vicarstown Baile an Bhiocaire,Baile an Bhiocáire,Ballynevicar,Ballyvicar,Ballyvicary,Vicarstown | Ireland, Leinster Laois | populated place | N 53° 2′ 57'' | W 7° 5′ 19'' |
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