| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Canton (Guangzhou) | cnl00000610 | China | — | — | |
| Cape Coast Castle | cnl00050702 | Ghana | -1.2425 | 5.103333 | |
| Cape of Good Hope | cnl00015822 | South Africa | — | — | |
| Cape Town | cnl00029683 | South Africa | 18.41 | -33.9094444444444 | |
| Capo d'Istria | cnl00021320 | Italy | 0.0 | 45.5497222222222 | |
| Capodimonte | cnl00022373 | Italy | — | — | |
| Capranica | cnl00020952 | Italy | 12.1666666666667 | 42.2666666666667 | |
| Capua | cnl00007998 | Italy | 14.1997222222222 | 41.1 | |
| Caravaggio | cnl00018911 | Italy | 9.65 | 45.5 | |
| Carcassone | cnl00008004 | France | 2.35 | 43.2197222222222 | |
| Cardiff | cnl00020028 | Wales | -3.179 | 51.48 | |
| Cardiganshire | cnl00023951 | Wales | — | — | |
| Careggi | cnl00002883 | Italy | 11.2466666666667 | 43.8061111111111 | |
| Cargins (Co. Galway) | — | Ireland | — | — | |
| Carhaix-Plouguer | cnl00019790 | — | — | — | |
| Carlisle | cnl00008011 | England | -2.93 | 54.88 | |
| Carlton (Cambridgeshire) | cnl00050709 | England | 0.4 | 52.15 | |
| Carluke | cnl00026605 | Scotland | -3.83305555555556 | 55.7330555555556 | |
| Carmarthen | cnl00001874 | Wales | -4.31666666666667 | 51.85 | |
| Carpentras | cnl00008022 | France | 5.05 | 44.05 | |
| Carpi | cnl00008023 | Italy | 10.88 | 44.78 | |
| Carthage | cnl00019499 | Tunisia | 10.33161 | 36.86108 | |
| Casale | cnl00008042 | Italy | 7.63972222222222 | 45.1797222222222 | |
| Casale Monferrato | cnl00008034 | Italy | 8.44944444444445 | 45.13 | |
| Casatico | cnl00021520 | Italy | 10.533333 | 45.116667 |