| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Trenton (New Jersey) | cnl00001699 | United States | — | — | |
| Treptow Rega | cnl00042363 | Poland | 15.2647222222222 | 54.0613888888889 | |
| Tresilico | cnl00020483 | Italy | — | — | |
| Treuenbrietzen | cnl00014764 | Germany | 12.8697222222222 | 52.1 | |
| Treviso (Itàlia) | cnl00014244 | Italy | 12.24 | 45.67 | |
| Trevoux | cnl00014767 | France | 4.76972222222222 | 45.9297222222222 | |
| Tribsees | cnl00023545 | Germany | — | — | |
| Trier | cnl00016240 | Germany | 6.62944444444445 | 49.75 | |
| Trieste | cnl00014774 | Italy | 13.7797222222222 | 45.6497222222222 | |
| Trino | cnl00014778 | Italy | 8.3 | 45.2 | |
| Tripoli | cnl00017484 | Lebanon | 35.85 | 34.433333 | |
| Trittenheim | cnl00019973 | Germany | — | — | |
| Trivolti | — | No country: false imprint | — | — | |
| Trnava | cnl00016685 | Slovakia | 17.5830555555556 | 48.3830555555556 | |
| Trogir | cnl00014738 | Croatia | 16.2397222222222 | 43.52 | |
| Trondheim | cnl00031399 | Norway | 10.4194444444444 | 63.42 | |
| Trosberg | cnl00001484 | Germany | — | — | |
| Trowbridge (Wiltshire) | cnl00003369 | England | -2.21666666666667 | 51.3166666666667 | |
| Troyes | cnl00008154 | France | 4.08 | 48.3 | |
| Truro | cnl00014791 | England | -5.04972222222222 | 50.27 | |
| Trysa | cnl00030532 | Germany | 9.18805555555556 | 50.9116666666667 | |
| Tsong-King tchéou | cnl00019146 | — | — | — | |
| Tübingen | cnl00014526 | Germany | 9.05 | 48.53 | |
| Tübingen [non-CERL] | — | — | — | — | |
| Tudela | cnl00003377 | Spain | -1.6 | 42.0666666666667 |