| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Corbières (Aude) | — | France | 1.9908 | 43.0408 | |
| Córdoba | cnl00008385 | Spain | -4.76972222222222 | 37.88 | |
| Corgémont | cnl00038522 | — | — | — | |
| Cork | cnl00008391 | Ireland | -8.49 | 51.9 | |
| Cormelles-le Royal | cnl00018832 | France | -0.3292 | 49.1547 | |
| Cormenon | — | France | 0.8944 | 47.9692 | |
| Corneto (Lazio) | cnl00019067 | Italy | 11.7580555555556 | 42.2541666666667 | |
| Cornwall | cnl00032961 | England | — | — | |
| Correggio | cnl00008396 | — | 10.7797222222222 | 44.77 | |
| Corse | cnl00018828 | France | — | — | |
| Corsham | cnl00025505 | England | — | — | |
| Corsignano | cnl00020329 | Italy | — | — | |
| Cortona | cnl00008399 | Italy | 11.98 | 43.27 | |
| Cosenza | cnl00008044 | Italy | 16.25 | 39.31 | |
| Cosmopolis | cnl00016434 | No country: false imprint | — | — | |
| Cosnac | cnl00019619 | France | 1.5864 | 45.1347 | |
| Cöthen | cnl00029727 | Germany | 11.97 | 51.75 | |
| Coton Clanford | cnl00020543 | England | — | — | |
| Coulommiers | cnl00008417 | France | 3.08305555555556 | 48.8166666666667 | |
| Coulston | cnl00021828 | England | — | — | |
| County Antrim | cnl00025784 | — | — | — | |
| Courcelles-le-Roi | cnl00020206 | France | 2.3189 | 48.0961 | |
| Courteuil | cnl00019903 | France | 2.5358 | 49.1997 | |
| Coutances | cnl00008419 | France | -1.42972222222222 | 49.0497222222222 | |
| Couture-sur-Loir | cnl00019927 | France | 0.6886 | 47.7544 |