| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Tap | city | Sligeach | Ireland | 54.1233333 | -8.2477778 | 810 | 2338 |
| Tawnalghta | city | Sligeach | Ireland | 54.1788889 | -8.9733333 | 374 | 2536 |
| Tawnavoultry | city | Sligeach | Ireland | 54.0925 | -8.6747222 | 249 | 2674 |
| Tawnyany | city | Sligeach | Ireland | 54.0869444 | -8.9397222 | 757 | 2421 |
| Templeboy | city | Sligeach | Ireland | 54.2458333 | -8.8125 | 239 | 2121 |
| Tobar an Choire | city | Sligeach | Ireland | 54.05 | -8.7333333 | 301 | 2655 |
| Toberawnaun | city | Sligeach | Ireland | 54.2577778 | -8.7222222 | 108 | 1314 |
| Tobercurry | city | Sligeach | Ireland | 54.05 | -8.7333333 | 301 | 2655 |
| Toberscanavan | city | Sligeach | Ireland | 54.1669444 | -8.4855556 | 216 | 2645 |
| Toberscardan | city | Sligeach | Ireland | 54.0783333 | -8.6997222 | 449 | 2586 |
| Toorlestraun | city | Sligeach | Ireland | 54.0397222 | -8.8425 | 190 | 2510 |
| Tubbercurry | city | Sligeach | Ireland | 54.05 | -8.7333333 | 301 | 2655 |
| Tullanaglug | city | Sligeach | Ireland | 54.0463889 | -8.7936111 | 226 | 2675 |
| Tullylin | city | Sligeach | Ireland | 54.1963889 | -9.0230556 | 229 | 2498 |
| Tunnagh | city | Sligeach | Ireland | 54.0252778 | -8.4991667 | 249 | 2684 |
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