| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Rohrau | cnl00023619 | Austria | 16.858333 | 48.066667 | |
| Roissy-en-Brie | cnl00024653 | France | 2.6519 | 48.7906 | |
| Rollot | cnl00019724 | France | 2.64972222222222 | 49.5830555555556 | |
| Roma | cnl00016199 | Italy | 12.48 | 41.8991666666667 | |
| Roma [non-CERL] | — | — | — | — | |
| Romagne-sous-Montfaucon | cnl00033358 | — | — | — | |
| Romorantin | cnl00003248 | France | 1.75 | 47.35 | |
| Romsey (Hampshire) | cnl00013345 | England | -1.5 | 50.98 | |
| Ronco | — | Italy | — | — | |
| Roscrea | cnl00003256 | Ireland | -7.79972222222222 | 52.95 | |
| Rosice | cnl00049136 | — | — | — | |
| Roskilde | cnl00013372 | Denmark | 12.08 | 55.65 | |
| Rostock | cnl00006277 | Germany | 12.13 | 54.08 | |
| Roth an der Rednitz | cnl00021954 | Germany | — | — | |
| Röthenbach im Emmental | cnl00050721 | Switzerland | 7.733333 | 46.85 | |
| Rothenburg ob der Tauber | cnl00033742 | Germany | 10.1788888888889 | 49.3769444444444 | |
| Rotherhithe | cnl00021305 | England | -0.0426 | 51.4989 | |
| Rothiemay | — | Scotland | -2.7565 | 57.5226 | |
| Rotterdam | cnl00013405 | Netherlands | 4.5 | 51.92 | |
| Rotterdam [non-CERL] | — | — | — | — | |
| Rouen | cnl00012658 | France | 1.08 | 49.43 | |
| Rouen [non-CERL] | — | — | — | — | |
| Rouffach | cnl00017020 | — | — | — | |
| Rovigo | cnl00013417 | Italy | 11.78 | 45.07 | |
| Rowton | cnl00020722 | England | — | — |