C
Town and County||style="width:100px;align:right;"|Population
| Cabragh, Monaghan | 201 |
| Caherconlish, Limerick | 616 |
| Cahir, Tipperary South | 2794 |
| Cahersiveen, Kerry | 10234 |
| Callan, Kilkenny | 1325 |
| Camolin, Wexford | 320 |
| Campile, Wexford | 335 |
| Cappamore, Limerick | 684 |
| Cappawhite, Tipperary South | 340 |
| Cappoquin, Waterford | 756 |
| Carlingford, Louth | 604 |
| Carlow Town, Carlow | 18487 |
| Carndonagh, Donegal | 1673 |
| Carnew, Wicklow | 809 |
| Carragh, Kildare | 242 |
| Carraroe, Galway | 629 |
| Carrick, Donegal | 245 |
| Carrickmacross Town, Monaghan | 3832 |
| Carrick-on-Shannon, Leitrim and Roscommon | 2237 |
| Carrick-on-Suir Town, Tipperary South | 5586 |
| Carrigaline, Cork | 11191 |
| Carrigallen, Leitrim | 257 |
| Carrigans, Donegal | 158 |
| Carrigtwohill, Cork | 1411 |
| Carrowkeel, Donegal | 253 |
| Cashel Town, Tipperary South | 2770 |
| Castlebar Town, Mayo | 11371 |
| Castlebellingham/Kilsaran, Louth | 721 |
| Castleblayney Town, Monaghan | 2936 |
| Castlebridge, Wexford | 1013 |
| Castlecomer-Donaguile, Kilkenny | 1482 |
| Castleconnell, Limerick | 1343 |
| Castledermot, Kildare | 726 |
| Castle Ellis, Wexford | 165 |
| Castlefin, Donegal | 783 |
| Castlegregory, Kerry | 186 |
| Castleisland, Kerry | 2162 |
| Castlelyons, Cork | 211 |
| Castlemartyr, Cork | 577 |
| Castlepollard, Westmeath | 895 |
| Castlerea, Roscommon | 2689 |
| Castletown, Laois | 289 |
| Castletownbere, Cork | 875 |
| Castletownroche, Cork | 423 |
| Castletownshend, Cork | 157 |
| Causeway, Kerry | 251 |
| Cavan Town, Cavan | 6098 |
| Ceannanus Mór (formerly Kells) Town, Meath | 4421 |
| Celbridge, Kildare | 16016 |
| Charlestown-Bellahy, Mayo and Sligo | 753 |
| Cheekpoint, Waterford | 325 |
| Churchbay, Cork | 270 |
| Clane, Kildare | 4417 |
| Clara, Offaly | 2704 |
| Claregalway, Galway | 562 |
| Claremorris, Mayo | 2101 |
| Clarinbridge, Galway | 173 |
| Clashmore, Waterford | 161 |
| Clifden, Galway | 1355 |
| Cliffoney, Sligo | 327 |
| Cloghan, Offaly | 523 |
| Clogh-Chatsworth, Kilkenny | 320 |
| Clogheen, Tipperary South | 550 |
| Clogherhead, Louth | 906 |
| Clonakilty Town, Cork | 3698 |
| Clonard, Meath | 248 |
| Clonaslee, Laois | 538 |
| Clonbullogue, Offaly | 390 |
| Clonee Village, Meath | 173 |
| Clonegal, Carlow and Wexford | 193 |
| Clones Town, Monaghan | 1947 |
| Clongeen, Wexford | 224 |
| Clonlara, Clare | 472 |
| Clonmany, Donegal | 393 |
| Clonmel Borough, Tipperary South | 16910 |
| Clonmellon, Westmeath | 403 |
| Clonroche, Wexford | 339 |
| Clontuskert, Roscommon | 236 |
| Cloonboo, Galway | 351 |
| Cloughjordan, Tipperary North | 431 |
| Cloyne, Cork | 785 |
| Coachford, Cork | 412 |
| Cobh Town, Cork | 9801 |
| Coill Dubh (or Blackwood), Kildare | 592 |
| Collinstown, Westmeath | 229 |
| Collon, Louth | 424 |
| Collooney, Sligo | 619 |
| Cong, Galway and Mayo | 185 |
| Conna, Cork | 258 |
| Convoy, Donegal | 1028 |
| Coolagary, Offaly | 241 |
| Coolaney, Sligo | 167 |
| Coolgreany, Wexford | 398 |
| Coonagh, Limerick | 222 |
| Cootehill, Cavan | 1744 |
| Cork City, Cork | 186239 |
| Corofin, Clare | 382 |
| Courtmacsherry, Cork | 259 |
| Courtown Harbour, Wexford | 502 |
| Cratloe, Clare | 656 |
| Craughwell, Galway | 358 |
| Creeslough, Donegal | 304 |
| Crocknamurleog, Donegal | 346 |
| Cromane, Kerry | 125 |
| Crookstown, Cork | 320 |
| Croom, Limerick | 1056 |
| Crosshaven, Cork | 1373 |
| Crossmolina, Mayo | 935 |
| Culdaff, Donegal | 182 |
Read more about this topic: List Of Towns In The Republic Of Ireland/2002 Census Records