| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Cumberlow (Hertfordshire) | — | England | — | — | |
| Cumbernauld | cnl00034296 | Scotland | — | — | |
| Cumbria | cnl00022423 | England | -2.91666666666667 | 54.5666666666667 | |
| Cuneo | cnl00008369 | — | 7.53 | 44.38 | |
| Curaçao | cnl00015814 | Curaçao | -68.990021 | 12.16957 | |
| Curdworth (Warwickshire) | cnl00050730 | England | -1.7353 | 52.5319 | |
| Cusco | cnl00020337 | Peru | -71.96734 | -13.52264 | |
| Cuts | cnl00020518 | France | 3.1006 | 49.5319 | |
| Dahlen | cnl00030738 | Germany | — | — | |
| Dalkeith | cnl00026620 | Scotland | -3.05 | 55.0666666666667 | |
| Dallet | cnl00017937 | France | 3.2394 | 45.7714 | |
| Dalquhurn House (now Renton, West Dunbartonshire) | — | Scotland | -4.584 | 55.971 | |
| Damas | cnl00018680 | — | — | — | |
| Damascus | cnl00018680 | Syria | 36.278336 | 33.510414 | |
| Damme | cnl00008511 | — | 3.28 | 51.25 | |
| Danzig (Gdansk) | cnl00006805 | Poland | 18.67 | 54.35 | |
| Daon-sur-Mayenne | cnl00018751 | France | -0.6375 | 47.7508 | |
| Darlington | cnl00008519 | England | -1.56972222222222 | 54.53 | |
| Darmstadt | cnl00016025 | Germany | 8.65 | 49.8697222222222 | |
| Darney | cnl00022919 | France | 6.0467 | 48.0858 | |
| Darwen | cnl00020258 | England | -2.45 | 53.7 | |
| Dauernheim | cnl00034723 | Germany | — | — | |
| Dauphiné | cnl00003665 | France | — | — | |
| Daventry | cnl00000357 | England | -1.16 | 52.26 | |
| Dax | cnl00001973 | France | -1.05527777777778 | 43.7072222222222 |