| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Caddagh | city | An Iarmhi | Ireland | 53.60 | -7.12 | 406 | 1617 |
| Canal Harbour | city | An Iarmhi | Ireland | 53.36 | -7.47 | 275 | 2326 |
| Cappanrush | city | An Iarmhi | Ireland | 53.35 | -7.42 | 314 | 1575 |
| Carnybrogan | city | An Iarmhi | Ireland | 53.65 | -7.05 | 360 | 1449 |
| Cartenstown | city | An Iarmhi | Ireland | 53.59 | -7.12 | 403 | 1680 |
| Casstletowndelvin | city | An Iarmhi | Ireland | 53.61 | -7.09 | 377 | 1545 |
| Castelpollard | city | An Iarmhi | Ireland | 53.67 | -7.30 | 328 | 1915 |
| Castledown | city | An Iarmhi | Ireland | 53.52 | -7.18 | 830 | 2060 |
| Castlepollard | city | An Iarmhi | Ireland | 53.67 | -7.30 | 328 | 1915 |
| Castletown | city | An Iarmhi | Ireland | 53.45 | -7.48 | 354 | 1197 |
| Castletown Gheoghegan | city | An Iarmhi | Ireland | 53.45 | -7.48 | 354 | 1197 |
| Castletowndelvin | city | An Iarmhi | Ireland | 53.61 | -7.09 | 380 | 1577 |
| Cavestown and Rosmead | city | An Iarmhi | Ireland | 53.64 | -7.06 | 351 | 1489 |
| Chanonstown | city | An Iarmhi | Ireland | 53.55 | -7.15 | 830 | 2041 |
| Christianstown | city | An Iarmhi | Ireland | 53.67 | -7.18 | 830 | 1325 |
| Churchtown | city | An Iarmhi | Ireland | 53.48 | -7.48 | 830 | 1093 |
| Cill Bheagain | city | An Iarmhi | Ireland | 53.37 | -7.50 | 262 | 1990 |
| Cill Chuimne | city | An Iarmhi | Ireland | 53.63 | -7.19 | 410 | 1424 |
| Cill Liúcainne | city | An Iarmhi | Ireland | 53.51 | -7.14 | 830 | 2342 |
| Cill Rois ??ochtarach | city | An Iarmhi | Ireland | 53.66 | -7.02 | 360 | 1553 |
| Cill Uailleach | city | An Iarmhi | Ireland | 53.59 | -7.16 | 830 | 1611 |
| Cill an Bhealaigh | city | An Iarmhi | Ireland | 53.38 | -7.41 | 374 | 1349 |
| Cionn Átha Gad | city | An Iarmhi | Ireland | 53.45 | -7.10 | 387 | 2651 |
| Clare | city | An Iarmhi | Ireland | 53.57 | -7.19 | 830 | 1375 |
| Cloghan | city | An Iarmhi | Ireland | 53.55 | -7.24 | 830 | 1836 |
| Cloghanstown | city | An Iarmhi | Ireland | 53.52 | -7.09 | 354 | 1873 |
| Clonarney | city | An Iarmhi | Ireland | 53.63 | -7.07 | 354 | 1471 |
| Clonbore | city | An Iarmhi | Ireland | 53.52 | -7.06 | 344 | 1377 |
| Cloncullen | city | An Iarmhi | Ireland | 53.52 | -7.19 | 830 | 1897 |
| Clondalever | city | An Iarmhi | Ireland | 53.61 | -7.21 | 830 | 1316 |
| Clondavreen | city | An Iarmhi | Ireland | 53.64 | -7.21 | 410 | 1399 |
| Clongowly | city | An Iarmhi | Ireland | 53.35 | -7.52 | 249 | 2274 |
| Clonleame | city | An Iarmhi | Ireland | 53.59 | -7.04 | 337 | 1387 |
| Clonmellon | city | An Iarmhi | Ireland | 53.66 | -7.02 | 357 | 1535 |
| Clonreagh | city | An Iarmhi | Ireland | 53.54 | -7.12 | 393 | 2037 |
| Clonyhague | city | An Iarmhi | Ireland | 53.41 | -7.43 | 337 | 1355 |
| Cloran and Corcullentry | city | An Iarmhi | Ireland | 53.64 | -6.98 | 334 | 2078 |
| Cluain Earna | city | An Iarmhi | Ireland | 53.63 | -7.07 | 354 | 1471 |
| Cnoc Maint | city | An Iarmhi | Ireland | 53.51 | -7.20 | 830 | 1514 |
| Collinstown | city | An Iarmhi | Ireland | 53.64 | -7.21 | 410 | 1372 |
| Coola Bridge | city | An Iarmhi | Ireland | 53.38 | -7.49 | 272 | 2021 |
| Coole | city | An Iarmhi | Ireland | 53.70 | -7.38 | 252 | 811 |
| Cooleighter | city | An Iarmhi | Ireland | 53.64 | -7.16 | 830 | 1471 |
| Coolnahay | city | An Iarmhi | Ireland | 53.53 | -7.47 | 830 | 1114 |
| Copperalley | city | An Iarmhi | Ireland | 53.58 | -7.00 | 301 | 1538 |
| Coralstown | city | An Iarmhi | Ireland | 53.48 | -7.17 | 830 | 2096 |
| Corbally | city | An Iarmhi | Ireland | 53.54 | -7.16 | 830 | 2244 |
| Corbetstown | city | An Iarmhi | Ireland | 53.54 | -7.13 | 410 | 2042 |
| Craddanstown | city | An Iarmhi | Ireland | 53.55 | -7.07 | 354 | 1282 |
| Creggan | city | An Iarmhi | Ireland | 53.41 | -7.88 | 341 | 12525 |
| Crookedwood | city | An Iarmhi | Ireland | 53.60 | -7.28 | 360 | 1431 |
| Crosserdree | city | An Iarmhi | Ireland | 53.57 | -7.18 | 830 | 1497 |
| Crowinstown Great | city | An Iarmhi | Ireland | 53.62 | -7.03 | 334 | 1505 |
| Crowinstown Little | city | An Iarmhi | Ireland | 53.63 | -7.04 | 341 | 1534 |
| Cummerstown | city | An Iarmhi | Ireland | 53.66 | -7.17 | 830 | 1392 |
| Cumminstown | city | An Iarmhi | Ireland | 53.60 | -7.08 | 374 | 1462 |
| Cumminstown | city | An Iarmhi | Ireland | 53.38 | -7.46 | 288 | 1971 |
| Curristown | city | An Iarmhi | Ireland | 53.51 | -7.12 | 396 | 2718 |
| Cúil na h??tha | city | An Iarmhi | Ireland | 53.53 | -7.47 | 830 | 1114 |