| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Tra Li | city | Ciarrai | Ireland | 52.2666667 | -9.7166667 | 124 | 2245 |
| Tra Mhor | city | Port Lairge | Ireland | 52.1588889 | -7.1463889 | 0 | 2135 |
| Tracarta | city | Corcaigh | Ireland | 51.5158333 | -9.1938889 | 0 | 3061 |
| Tracton | city | Corcaigh | Ireland | 51.7613889 | -8.4163889 | 246 | 5056 |
| Trafrask | city | Corcaigh | Ireland | 51.6916667 | -9.6705556 | 124 | 3110 |
| Trafrask Bridge | city | Corcaigh | Ireland | 51.6941667 | -9.6619444 | 134 | 3091 |
| Tralee | city | Ciarrai | Ireland | 52.2666667 | -9.7166667 | 124 | 2245 |
| Tramore | city | Corcaigh | Ireland | 51.8772222 | -8.445 | 150 | 5215 |
| Tramore | city | Port Lairge | Ireland | 52.1588889 | -7.1463889 | 0 | 2135 |
| Tranagh | city | Tiobraid Arann | Ireland | 52.6947222 | -7.6025 | 459 | 2943 |
| Travara Bridge | city | Corcaigh | Ireland | 51.6777778 | -10.05556 | 288 | 1197 |
| Trawbaun | city | Gaillimh | Ireland | 53.2411111 | -9.6605556 | 3 | 904 |
| Treanagh | city | Maigh Eo | Ireland | 54.1580556 | -9.3288889 | 164 | 1793 |
| Treannagleragh | city | Maigh Eo | Ireland | 53.8536111 | -9.0444444 | 219 | 1807 |
| Treantagh | city | County Donegal | Ireland | 55 | -7.8427778 | 236 | 2307 |
| Treantagh | city | County Donegal | Ireland | 54.9266667 | -7.4875 | 114 | 2455 |
| Treanybrogaun | city | Maigh Eo | Ireland | 53.9308333 | -9.1894444 | 95 | 1807 |
| Treehog Cross Roads | city | An Cabhan | Ireland | 54.0791667 | -7.2613889 | 255 | 2574 |
| Trench Bridge | city | Ciarrai | Ireland | 52.2705556 | -10.0294444 | 49 | 1034 |
| Trim | city | An Mhi | Ireland | 53.555 | -6.7916667 | 200 | 4173 |
| Trimblestown Bridge | city | County Offaly | Ireland | 53.3422222 | -7.1330556 | 364 | 2819 |
| Trimoge Bridge | city | Maigh Eo | Ireland | 53.9111111 | -9.02 | 95 | 1806 |
| Tristia | city | Maigh Eo | Ireland | 54.1327778 | -9.845 | 209 | 1648 |
| Tromra | city | An Clar | Ireland | 52.8066667 | -9.4655556 | 55 | 1020 |
| Trooperstown | city | County Donegal | Ireland | 55.0602778 | -7.385 | 36 | 4964 |
| Trooperstown | city | Cill Mhantain | Ireland | 52.9969444 | -6.2658333 | 1040 | 4575 |
| Trough | city | | Ireland | 52.7333333 | -8.6166667 | 229 | 2809 |
| Trumra | city | Laois | Ireland | 52.9847222 | -7.4194444 | 360 | 2780 |
| Trusklieve | city | An Clar | Ireland | 52.6277778 | -9.7644444 | 226 | 933 |
| Trá Lí | city | Ciarrai | Ireland | 52.2666667 | -9.7166667 | 124 | 2245 |
| Trá Mhór | city | Port Lairge | Ireland | 52.1588889 | -7.1463889 | 0 | 2135 |
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