| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cleady | city | Kerry | Ireland | 51.90 | -9.53 | 216 | 1452 |
| Cleaheen | city | Roscommon | Ireland | 53.97 | -8.10 | 249 | 3323 |
| Cleanagh | city | Laois | Ireland | 52.91 | -7.21 | 830 | 1469 |
| Cleanderry | city | Cork | Ireland | 51.74 | -9.95 | 219 | 484 |
| Clearies Cross Roads | city | Cork | Ireland | 51.94 | -7.93 | 193 | 2183 |
| Cleariestown | city | Wexford | Ireland | 52.27 | -6.59 | 157 | 2596 |
| Cleary's Cross Roads | city | Ireland | 51.97 | -7.78 | 183 | 1568 | |
| Cleary’s Cross Roads | city | Ireland | 51.97 | -7.78 | 183 | 1568 | |
| Cleaveragh | city | Sligo | Ireland | 54.26 | -8.45 | 42 | 22109 |
| Cleedagh Bridge | city | Clare | Ireland | 52.86 | -9.43 | 101 | 1842 |
| Cleenaghoo | city | Leitrim | Ireland | 54.06 | -7.78 | 249 | 1730 |
| Cleentvearthy | city | Cork | Ireland | 51.89 | -9.13 | 830 | 1077 |
| Cleggan | city | Galway | Ireland | 53.55 | -10.12 | 203 | 724 |
| Cleggan Lower | city | Donegal | Ireland | 55.20 | -8.00 | 295 | 689 |
| Cleggan Upper | city | Donegal | Ireland | 55.20 | -8.00 | 295 | 689 |
| Clements Town | city | Cavan | Ireland | 54.08 | -7.10 | 255 | 2984 |
| Clenagh | city | Clare | Ireland | 52.73 | -8.95 | 0 | 6725 |
| Cleraun | city | Longford | Ireland | 53.55 | -7.95 | 203 | 547 |
| Clerhaun | city | Mayo | Ireland | 53.79 | -9.54 | 246 | 7398 |
| Cleristown | city | Wexford | Ireland | 52.27 | -6.59 | 157 | 2596 |
| Clerragh | city | Roscommon | Ireland | 54.03 | -8.23 | 308 | 960 |