| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| An Cobh | city | Cork | Ireland | 51.86 | -8.30 | 154 | 17231 |
| An Coilleán | city | Offaly | Ireland | 53.10 | -7.84 | 249 | 1944 |
| An Coillin Darach | city | Donegal | Ireland | 54.82 | -7.51 | 88 | 4292 |
| An Coillteach | city | Clare | Ireland | 52.59 | -9.81 | 3 | 396 |
| An Coillín | city | Clare | Ireland | 52.96 | -9.06 | 170 | 1336 |
| An Coillín | city | Laois | Ireland | 52.90 | -6.98 | 206 | 2163 |
| An Coillín | city | Sligo | Ireland | 54.21 | -8.99 | 249 | 1452 |
| An Coillín | city | Ireland | 53.09 | -7.95 | 216 | 4124 | |
| An Coillín | city | Ireland | 52.72 | -8.43 | 209 | 4084 | |
| An Coimín | city | Donegal | Ireland | 54.82 | -7.98 | 830 | 521 |
| An Coimín | city | Donegal | Ireland | 54.95 | -8.13 | 154 | 332 |
| An Coinicéar | city | Offaly | Ireland | 53.25 | -7.65 | 242 | 1335 |
| An Coirean | city | Kerry | Ireland | 51.83 | -10.17 | 45 | 793 |
| An Com | city | Kerry | Ireland | 52.11 | -9.26 | 830 | 2298 |
| An Com Beag | city | Ireland | 52.85 | -8.36 | 987 | 1718 | |
| An Comar | city | Wexford | Ireland | 52.74 | -6.42 | 830 | 1474 |
| An Comar Íochtarach | city | Offaly | Ireland | 53.08 | -7.73 | 830 | 878 |
| An Corrbhaile | city | Laois | Ireland | 52.94 | -7.35 | 830 | 2977 |
| An Corrbhaile | city | Clare | Ireland | 52.71 | -9.65 | 3 | 1639 |
| An Corrbhaile | city | Sligo | Ireland | 54.17 | -9.08 | 104 | 2265 |
| An Corrbhaile | city | Fingal | Ireland | 53.48 | -6.14 | 3 | 30144 |
| An Corrán | city | Mayo | Ireland | 53.87 | -9.93 | 3 | 400 |
| An Corrán | city | Wexford | Ireland | 52.53 | -6.51 | 223 | 5658 |
| An Corrán Buí | city | Mayo | Ireland | 54.30 | -9.79 | 124 | 633 |