| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Redding | cnl00023226 | United States | — | — | |
| Rees | cnl00013140 | Germany | 6.4 | 51.77 | |
| Regensburg | cnl00016188 | Germany | 12.0991666666667 | 49.02 | |
| Reggio di Calabria | cnl00024075 | Italy | 15.6666666666667 | 38.1166666666667 | |
| Reggio Emilia | cnl00027275 | Italy | 10.6330555555556 | 44.7 | |
| Rehweiler | cnl00032316 | Germany | 7.44165 | 49.485506 | |
| Reigate (Surrey) | cnl00022881 | England | -0.206 | 51.237 | |
| Reims | cnl00013170 | France | 4.03 | 49.25 | |
| Remiremont | cnl00013185 | France | 6.58 | 48.02 | |
| Rendsburg | cnl00013192 | — | 9.66972222222222 | 54.2997222222222 | |
| Renescure | cnl00024689 | France | 2.3694 | 50.7272 | |
| Rennes | cnl00013197 | France | -1.68 | 48.08 | |
| Rennes [non-CERL] | — | — | — | — | |
| Rethel | cnl00013206 | France | 4.37 | 49.52 | |
| Réunion | cnl00024198 | — | — | — | |
| Reutlingen | cnl00013213 | — | 9.22 | 48.4797222222222 | |
| Revel | cnl00018952 | France | 2.0047 | 43.4594 | |
| Revello | cnl00003513 | Italy | 7.38305555555556 | 44.6494444444444 | |
| Rhaude | cnl00031749 | Germany | — | — | |
| Rheinsberg | cnl00013230 | Germany | 12.88 | 53.1 | |
| Rheintal | cnl00001223 | — | — | — | |
| Rheinzabern | cnl00033809 | Germany | 8.28305555555556 | 48.1166666666667 | |
| Rhenen | cnl00016329 | Netherlands | 5.56666666666667 | 51.9666666666667 | |
| Ri (Orne) | cnl00021464 | France | -0.1367 | 48.7917 | |
| Ribben | cnl00013238 | Denmark | 8.77 | 55.35 |