| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Caldavnet | city | County Monaghan | Ireland | 54.3255556 | -7.0386111 | 629 | 3473 |
| Calliagh | city | County Monaghan | Ireland | 54.1805556 | -7.0236111 | 501 | 3483 |
| Cargaghlisnanarney | city | County Monaghan | Ireland | 54.0294444 | -6.6455556 | 272 | 4725 |
| Carraig Mhachaire Rois | city | County Monaghan | Ireland | 53.9727778 | -6.7188889 | 262 | 3503 |
| Carraskea | city | County Monaghan | Ireland | 54.1461111 | -7.2505556 | 232 | 3096 |
| Carrickartagh | city | County Monaghan | Ireland | 54.08333 | -6.7977778 | 498 | 3494 |
| Carrickaslane | city | County Monaghan | Ireland | 54.1494444 | -6.7563889 | 469 | 3697 |
| Carrickmaclim | city | County Monaghan | Ireland | 53.9813889 | -6.7811111 | 400 | 3465 |
| Carrickmacross | city | County Monaghan | Ireland | 53.9727778 | -6.7188889 | 262 | 3503 |
| Carrickroe | city | County Monaghan | Ireland | 54.3569444 | -7.0277778 | 1295 | 3562 |
| Carrigans | city | County Monaghan | Ireland | 54.3205556 | -6.9611111 | 249 | 3473 |
| Carsons Bridge | city | County Monaghan | Ireland | 54.2377778 | -7.0280556 | 239 | 3480 |
| Cashlan | city | County Monaghan | Ireland | 54.0161111 | -6.7427778 | 324 | 3506 |
| Castleblayney | city | County Monaghan | Ireland | 54.1166667 | -6.7333333 | 436 | 3491 |
| Castleshane | city | County Monaghan | Ireland | 54.2380556 | -6.8838889 | 269 | 3602 |
| Cavan | city | County Monaghan | Ireland | 54.2116667 | -7.2102778 | 242 | 2952 |
| Cavan | city | County Monaghan | Ireland | 54.3994444 | -7.0394444 | 921 | 4157 |
| Cavanagarvan | city | County Monaghan | Ireland | 54.19 | -6.9888889 | 501 | 3483 |
| Cloghernagh | city | County Monaghan | Ireland | 54.2022222 | -7.1019444 | 370 | 3468 |
| Clones | city | County Monaghan | Ireland | 54.1833333 | -7.2333333 | 242 | 3168 |
| Clonkirk | city | County Monaghan | Ireland | 54.1913889 | -7.2247222 | 242 | 3168 |
| Clonoula | city | County Monaghan | Ireland | 54.1555556 | -7.3166667 | 393 | 2863 |
| Clontibret | city | County Monaghan | Ireland | 54.2036111 | -6.8383333 | 433 | 3608 |
| Clontoe | city | County Monaghan | Ireland | 54.2733333 | -7.0258333 | 239 | 3476 |
| Cluain Eois | city | County Monaghan | Ireland | 54.1833333 | -7.2333333 | 242 | 3168 |
| Coolcorragh | city | County Monaghan | Ireland | 54.2058333 | -7.0569444 | 482 | 3483 |
| Coolmannan | city | County Monaghan | Ireland | 54.1363889 | -6.8297222 | 469 | 3529 |
| Corfad | city | County Monaghan | Ireland | 54.1358333 | -6.9111111 | 429 | 3487 |
| Corgreagh | city | County Monaghan | Ireland | 54.0186111 | -6.9288889 | 475 | 2891 |
| Corlat | city | County Monaghan | Ireland | 54.1966667 | -7.0966667 | 370 | 3468 |
| Corlealackagh | city | County Monaghan | Ireland | 54.1455556 | -6.8188889 | 479 | 3529 |
| Corlougharoe | city | County Monaghan | Ireland | 54.1458333 | -7.1091667 | 252 | 3434 |
| Corragarry Cross Roads | city | County Monaghan | Ireland | 54.1144444 | -7.1638889 | 252 | 3111 |
| Corraghbrack | city | County Monaghan | Ireland | 54.3041667 | -6.9869444 | 321 | 3473 |
| Corryarbeg | city | County Monaghan | Ireland | 54.3555556 | -7.0608333 | 482 | 3768 |
| Cortaghart | city | County Monaghan | Ireland | 54.0613889 | -6.8930556 | 492 | 3412 |
| Cortober | city | County Monaghan | Ireland | 54.0391667 | -6.9255556 | 426 | 2891 |
| Cortolym Bridge | city | County Monaghan | Ireland | 54.2402778 | -6.9869444 | 249 | 3480 |
| Corvally | city | County Monaghan | Ireland | 53.9947222 | -6.8522222 | 495 | 3051 |
| Corvoy | city | County Monaghan | Ireland | 54.1638889 | -6.8983333 | 498 | 3487 |
| Creaghanroe | city | County Monaghan | Ireland | 54.1666667 | -6.7333333 | 498 | 4943 |
| Creeran | city | County Monaghan | Ireland | 54.1208333 | -7.1611111 | 252 | 3111 |
| Creevagh | city | County Monaghan | Ireland | 54.1486111 | -6.9252778 | 452 | 3487 |
| Creeve | city | County Monaghan | Ireland | 54.0955556 | -6.9116667 | 705 | 3490 |
| Creeve | city | County Monaghan | Ireland | 54.1861111 | -6.8452778 | 521 | 3608 |
| Creevelands | city | County Monaghan | Ireland | 54.1027778 | -6.895 | 534 | 3490 |
| Creevelea | city | County Monaghan | Ireland | 54.1855556 | -7.1641667 | 232 | 3415 |
| Cremoyle | city | County Monaghan | Ireland | 54.1577778 | -6.9833333 | 462 | 3474 |
| Crossbane | city | County Monaghan | Ireland | 54.1419444 | -7.1936111 | 508 | 3419 |
| Cuil Darach | city | County Monaghan | Ireland | 54.1563889 | -7.135 | 282 | 3444 |
| Culloville | city | County Monaghan | Ireland | 54.0522222 | -6.6661111 | 351 | 5474 |
| Cúil Darach | city | County Monaghan | Ireland | 54.1563889 | -7.135 | 282 | 3444 |
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