| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Alder Trees | city | Loch Garman | Ireland | 52.5883333 | -6.4997222 | 209 | 4026 |
| Aldworth's Bridge | city | Corcaigh | Ireland | 52.2177778 | -9.0213889 | 524 | 5174 |
| Aldworthʼs Bridge | city | Corcaigh | Ireland | 52.2177778 | -9.0213889 | 524 | 5174 |
| Alexandra Bridge | city | Cill Dara | Ireland | 53.2875 | -6.6822222 | 275 | 7152 |
| Alkill | city | County Monaghan | Ireland | 54.2505556 | -6.8608333 | 236 | 4861 |
| Allagesh | city | County Monaghan | Ireland | 54.2625 | -7.1133333 | 255 | 3439 |
| Alleeny Bridge | city | Gaillimh | Ireland | 53.0275 | -8.3905556 | 249 | 2747 |
| Allen | city | Cill Dara | Ireland | 53.2405556 | -6.87 | 452 | 7161 |
| Allen's Bridge | city | Corcaigh | Ireland | 52.1875 | -8.9661111 | 449 | 5178 |
| Allenwood | city | Cill Dara | Ireland | 53.2869444 | -6.8944444 | 262 | 7152 |
| Allenwood Cross Roads | city | Cill Dara | Ireland | 53.2863889 | -6.8277778 | 285 | 7152 |
| Allenʼs Bridge | city | Corcaigh | Ireland | 52.1875 | -8.9661111 | 449 | 5178 |
| Allihies | city | Corcaigh | Ireland | 51.6333333 | -10.0333333 | 439 | 3226 |
| Alloon Lower | city | Gaillimh | Ireland | 53.3933333 | -8.4758333 | 249 | 2870 |
| Almaseed Bridge | city | Tiobraid Arann | Ireland | 52.2938889 | -8.1663889 | 495 | 3527 |
| Alt | city | County Donegal | Ireland | 54.765 | -7.5913889 | 387 | 2655 |
| Alt Lower | city | County Donegal | Ireland | 54.7666667 | -7.5833333 | 377 | 2873 |
| Alt Upper | city | County Donegal | Ireland | 54.765 | -7.5913889 | 387 | 2655 |
| Altadoo | city | County Donegal | Ireland | 54.6822222 | -8.1716667 | 282 | 2150 |
| Altadush | city | County Donegal | Ireland | 54.9313889 | -7.9494444 | 501 | 2310 |
| Altagowlan | city | Ros Comain | Ireland | 54.1083333 | -8.1527778 | 551 | 1772 |
| Altahalla | city | County Donegal | Ireland | 55.2463889 | -7.4077778 | 259 | 2256 |
| Altakeeran | city | County Leitrim | Ireland | 54.1163889 | -7.905 | 915 | 1581 |
| Altans | city | Sligeach | Ireland | 54.2441667 | -8.8469444 | 246 | 2152 |
| Altateskin | city | An Cabhan | Ireland | 54.1511111 | -7.7847222 | 574 | 2282 |
| Altnabrocky | city | Maigh Eo | Ireland | 54.0822222 | -9.5738889 | 255 | 1797 |
| Altnagapple | city | County Donegal | Ireland | 54.7283333 | -8.3761111 | 482 | 2264 |
| Altnapaste | city | County Donegal | Ireland | 54.8147222 | -7.8991667 | 269 | 2315 |
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