| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Tullamore | cnl00048954 | Ireland | -7.48888888888889 | 53.2738888888889 | |
| Tulle | cnl00014809 | France | 1.77 | 45.27 | |
| Tunbridge Wells (Kent) | cnl00017552 | England | 0.263 | 51.132 | |
| Tunis | cnl00002134 | Tunisia | 10.1830555555556 | 36.7997222222222 | |
| Turin | cnl00013610 | — | 7.66944444444445 | 45.0491666666667 | |
| Turin [non-CERL] | — | — | — | — | |
| Turku | cnl00006324 | Finland | 22.28 | 60.45 | |
| Turnhout | cnl00014638 | Belgium | 4.95 | 51.32 | |
| Turusa | cnl00006324 | Finland | 22.28 | 60.45 | |
| Tus | cnl00019719 | Iran | 59.566831066 | 36.45249819 | |
| Tuxford | — | England | — | — | |
| Túy | cnl00040062 | Spain | -8.64416666666667 | 42.0469444444444 | |
| Twickenham (London) | cnl00017354 | England | -0.341388888888889 | 51.4555555555556 | |
| Twywell (Northamptonshire) | cnl00050690 | England | -0.6039 | 52.3927 | |
| Tyre | cnl00020298 | Lebanon | — | — | |
| Úbeda | cnl00027600 | Spain | -3.372447 | 38.014122 | |
| Überlingen | cnl00014831 | — | 9.16972222222222 | 47.77 | |
| Udine | cnl00014245 | Italy | 13.24 | 46.06 | |
| Uelsen | cnl00023809 | Germany | 6.866667 | 52.5 | |
| Uelzen | cnl00016241 | Germany | 10.57 | 52.97 | |
| Ugento | cnl00037884 | Italy | 18.1572222222222 | 39.9261111111111 | |
| Uithoorn | cnl00033003 | Netherlands | 4.833333 | 52.233333 | |
| Ukraine | cnl00017299 | — | — | — | |
| Ulfborg | — | Denmark | 8.318905 | 56.268715 | |
| Ulm | cnl00016242 | Germany | 10.0 | 48.4 |