| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Teigur | city | Iceland | 65.62 | -18.10 | 88 | 4105 | |
| Thingholl | city | Iceland | 65.72 | -18.17 | 131 | 3796 | |
| Thorleifsstadhir | city | Iceland | 65.87 | -18.72 | 301 | 0 | |
| Thormodhsstadhir | city | Iceland | 65.37 | -18.18 | 1095 | 0 | |
| Thoroddsstadhir | city | Iceland | 66.03 | -18.73 | 22 | 231 | |
| Thorsnes | city | Iceland | 65.72 | -18.13 | 0 | 4201 | |
| Thorsteinsstadhir | city | Iceland | 65.87 | -18.82 | 728 | 0 | |
| Thrastarholl | city | Iceland | 65.78 | -18.27 | 98 | 214 | |
| Thrihyrningur | city | Iceland | 65.75 | -18.32 | 108 | 30 | |
| Thufnavellir | city | Iceland | 65.65 | -18.52 | 1220 | 0 | |
| Thvera | city | Iceland | 65.82 | -18.62 | 282 | 0 | |
| Thvera | city | Iceland | 65.62 | -18.05 | 68 | 1543 | |
| Thvera | city | Iceland | 65.60 | -18.52 | 784 | 0 | |
| Thvera | city | Iceland | 65.88 | -18.62 | 108 | 0 | |
| Thverbrekka | city | Iceland | 65.57 | -18.57 | 846 | 0 | |
| Tjarnar-Gardhshorn | city | Iceland | 65.92 | -18.58 | 55 | 495 | |
| Tjarnar-Garðshorn | city | Iceland | 65.92 | -18.58 | 55 | 495 | |
| Tjarnir | city | Iceland | 65.58 | -18.05 | 456 | 256 | |
| Tjarnir | city | Iceland | 65.30 | -18.25 | 1056 | 0 | |
| Tjörn | city | Iceland | 65.93 | -18.57 | 45 | 627 | |
| Tonnes | city | Iceland | 65.88 | -18.27 | 0 | 101 | |
| Torfnes | city | Iceland | 65.88 | -18.27 | 0 | 101 | |
| Torfufell | city | Iceland | 65.32 | -18.25 | 1095 | 0 | |
| Torfur | city | Iceland | 65.50 | -18.15 | 170 | 0 | |
| Trestadhir | city | Iceland | 65.75 | -18.23 | 413 | 230 | |
| Tréstaðir | city | Iceland | 65.75 | -18.23 | 413 | 230 | |
| Tungufell | city | Iceland | 65.87 | -18.65 | 344 | 0 |