| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tallow | city | Ireland | 52.09 | -8.01 | 203 | 1999 | |
| Tallowbridge | city | Ireland | 52.10 | -8.00 | 101 | 1980 | |
| The Pike | city | Ireland | 52.04 | -7.97 | 830 | 1403 | |
| The Pike | city | Ireland | 52.13 | -7.56 | 246 | 3573 | |
| The Punchbowl | city | Ireland | 52.32 | -7.67 | 1036 | 10380 | |
| The Sweep | city | Ireland | 52.22 | -7.23 | 203 | 3426 | |
| The Three Doons | city | Ireland | 52.21 | -7.98 | 1026 | 856 | |
| Tikincor | city | Ireland | 52.35 | -7.65 | 259 | 11252 | |
| Tiknock | city | Ireland | 51.98 | -7.84 | 42 | 7863 | |
| Tinalira | city | Ireland | 52.18 | -7.73 | 830 | 1060 | |
| Toor Cross Roads | city | Ireland | 52.05 | -7.75 | 830 | 890 | |
| Toor South | city | Ireland | 52.02 | -7.74 | 830 | 1054 | |
| Tooracurragh | city | Ireland | 52.27 | -7.75 | 830 | 1248 | |
| Tooradoo | city | Ireland | 52.18 | -8.05 | 830 | 1069 | |
| Toorala | city | Ireland | 52.28 | -7.72 | 830 | 1380 | |
| Tooranarahean | city | Ireland | 52.21 | -7.84 | 1010 | 1498 | |
| Tooraneena | city | Ireland | 52.20 | -7.71 | 830 | 1116 | |
| Tooreen | city | Ireland | 52.26 | -7.64 | 915 | 879 | |
| Tourin | city | Ireland | 52.12 | -7.87 | 131 | 1786 | |
| Towergare | city | Ireland | 52.20 | -7.14 | 173 | 27920 | |
| Tramore | city | Ireland | 52.16 | -7.15 | 0 | 8544 | |
| Trá Mhór | city | Ireland | 52.16 | -7.15 | 0 | 8544 | |
| Tulach an Iarainn | city | Ireland | 52.09 | -8.01 | 203 | 1999 | |
| Twomile Bridge | city | Ireland | 52.07 | -7.67 | 160 | 6748 |