| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cairbre | city | Kildare | Ireland | 53.36 | -6.97 | 269 | 2123 |
| Cairlinn | city | Lu | Ireland | 54.04 | -6.19 | 108 | 3269 |
| Caiseal | city | Ireland | 52.52 | -7.89 | 830 | 4498 | |
| Caiseal na gCorr | city | Donegal | Ireland | 55.08 | -8.10 | 830 | 1223 |
| Caisle Geala | city | Sligo | Ireland | 54.32 | -8.42 | 830 | 6234 |
| Caislean Ui Chonaill | city | Ireland | 52.71 | -8.50 | 180 | 6835 | |
| Caislean an Chomair | city | Kilkenny | Ireland | 52.81 | -7.21 | 830 | 3558 |
| Caislean na Mainge | city | Kerry | Ireland | 52.17 | -9.70 | 216 | 2403 |
| Caisleán Boirne | city | Clare | Ireland | 53.03 | -9.07 | 830 | 338 |
| Caisleán Cnucha | city | Fingal | Ireland | 53.38 | -6.39 | 91 | 120165 |
| Caisleán Ghriaire | city | Kerry | Ireland | 52.26 | -10.02 | 101 | 1056 |
| Caisleán Mhistéil Theas | city | Kildare | Ireland | 52.99 | -7.07 | 269 | 2011 |
| Caisleán Mháirtín | city | Meath | Ireland | 53.68 | -6.78 | 209 | 3382 |
| Caisleán Réabáin Thuaidh | city | Kildare | Ireland | 53.03 | -7.07 | 223 | 1645 |
| Caisleán Samsún | city | Roscommon | Ireland | 53.41 | -8.12 | 314 | 1199 |
| Caisleán an Bhainne | city | Kilkenny | Ireland | 52.44 | -7.17 | 830 | 1301 |
| Caisleán an Bhairínigh | city | Kilkenny | Ireland | 52.69 | -7.11 | 830 | 1331 |
| Caisleán an Bharraigh | city | Mayo | Ireland | 53.85 | -9.30 | 160 | 13196 |
| Caisleán an Uathair | city | Sligo | Ireland | 54.21 | -8.39 | 259 | 1441 |
| Caisleán na Craobhaí | city | Galway | Ireland | 53.39 | -9.02 | 95 | 2970 |
| Caisleán na Finne | city | Donegal | Ireland | 54.80 | -7.58 | 104 | 3155 |
| Caisleán Ó Liatháin | city | Cork | Ireland | 52.09 | -8.28 | 226 | 5549 |