| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Teampall Tuaithe | city | Ireland | 52.79 | -7.72 | 830 | 1289 | |
| Templederry | city | Ireland | 52.78 | -8.06 | 830 | 1184 | |
| Templemore | city | Ireland | 52.79 | -7.83 | 383 | 3415 | |
| Templetouhy | city | Ireland | 52.79 | -7.72 | 830 | 1289 | |
| Templetuohy | city | Ireland | 52.79 | -7.72 | 830 | 1289 | |
| Terryglass | city | Ireland | 53.05 | -8.20 | 183 | 2299 | |
| The Fourteen Roads | city | Ireland | 52.89 | -7.88 | 830 | 1006 | |
| The Gap | city | Ireland | 52.82 | -7.93 | 1076 | 1002 | |
| The Pike | city | Ireland | 53.00 | -8.01 | 830 | 1234 | |
| The Rag | city | Ireland | 52.72 | -7.92 | 298 | 1995 | |
| Thurles | city | Ireland | 52.68 | -7.80 | 328 | 10210 | |
| Tober | city | Ireland | 52.83 | -7.88 | 830 | 1175 | |
| Toomevara | city | Ireland | 52.85 | -8.03 | 830 | 1318 | |
| Toomyvara | city | Ireland | 52.85 | -8.03 | 830 | 1318 | |
| Toor | city | Ireland | 52.73 | -8.30 | 954 | 939 | |
| Tooreenbrien | city | Ireland | 52.69 | -8.27 | 987 | 1017 | |
| Tooreenbrien Bridge | city | Ireland | 52.69 | -8.27 | 987 | 1017 | |
| Tuaim Uí Mheára | city | Ireland | 52.85 | -8.03 | 830 | 1318 | |
| Tullowmacjames | city | Ireland | 52.80 | -7.71 | 830 | 1262 | |
| Turnpike | city | Ireland | 52.67 | -7.68 | 830 | 1793 | |
| Twomileborris | city | Ireland | 52.67 | -7.72 | 413 | 2427 | |
| Tír Dhá Ghlas | city | Ireland | 53.05 | -8.20 | 183 | 2299 |