| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tamhnaí Liatha | city | Leitrim | Ireland | 54.21 | -8.16 | 216 | 763 |
| Tarmon | city | Leitrim | Ireland | 54.13 | -8.08 | 190 | 775 |
| Tawnylea | city | Leitrim | Ireland | 54.21 | -8.16 | 216 | 763 |
| The Doons | city | Leitrim | Ireland | 54.29 | -8.33 | 830 | 985 |
| Tulaigh Choirce | city | Leitrim | Ireland | 54.13 | -8.12 | 830 | 825 |
| Tulaigh Leacan Bheag | city | Leitrim | Ireland | 54.11 | -7.89 | 830 | 473 |
| Tulaigh Mhuirígh | city | Leitrim | Ireland | 54.13 | -8.10 | 190 | 796 |
| Tulaigh Sceithearnaí | city | Leitrim | Ireland | 54.29 | -8.15 | 830 | 1715 |
| Tulaigh an Mhuilinn | city | Leitrim | Ireland | 54.22 | -8.17 | 830 | 757 |
| Tulaigh an Tabhaill | city | Leitrim | Ireland | 54.20 | -8.14 | 830 | 734 |
| Tulaigh na Scríne | city | Leitrim | Ireland | 54.17 | -8.28 | 830 | 1000 |
| Tullaghan | city | Leitrim | Ireland | 54.47 | -8.33 | 3 | 1839 |
| Tullintowell | city | Leitrim | Ireland | 54.20 | -8.14 | 830 | 734 |
| Tullinwillin | city | Leitrim | Ireland | 54.22 | -8.17 | 830 | 757 |
| Tully | city | Leitrim | Ireland | 54.35 | -8.25 | 396 | 525 |
| Tullycorka | city | Leitrim | Ireland | 54.13 | -8.12 | 830 | 825 |
| Tullyderrin | city | Leitrim | Ireland | 54.39 | -8.08 | 232 | 1414 |
| Tullylackan Beg | city | Leitrim | Ireland | 54.11 | -7.89 | 830 | 473 |
| Tullymurray | city | Leitrim | Ireland | 54.13 | -8.10 | 190 | 796 |
| Tullynascreen | city | Leitrim | Ireland | 54.17 | -8.28 | 830 | 1000 |
| Tullyskeherny | city | Leitrim | Ireland | 54.37 | -8.12 | 393 | 871 |
| Tullyskeherny | city | Leitrim | Ireland | 54.29 | -8.15 | 830 | 1715 |