| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tannastadhir | city | Iceland | 63.98 | -21.00 | 111 | 1313 | |
| Tannastaðir | city | Iceland | 63.98 | -21.00 | 111 | 1313 | |
| Thingdalur | city | Iceland | 63.90 | -20.77 | 124 | 116 | |
| Thingvellir | city | Iceland | 64.25 | -21.12 | 331 | 42 | |
| Thjorsarbru | city | Iceland | 63.93 | -20.67 | 157 | 11 | |
| Thjorsarholt | city | Iceland | 64.03 | -20.22 | 308 | 0 | |
| Thjotandi | city | Iceland | 63.93 | -20.65 | 229 | 81 | |
| Thorarinsstadhir | city | Iceland | 64.17 | -20.25 | 547 | 44 | |
| Thordharkot | city | Iceland | 63.90 | -21.17 | 26 | 603 | |
| Thorisstadhir | city | Iceland | 64.10 | -20.63 | 229 | 66 | |
| Thorlakshofn | city | Iceland | 63.85 | -21.37 | 0 | 180 | |
| Thorlakssaeti | city | Iceland | 64.12 | -20.52 | 190 | 144 | |
| Thoroddsstadhir | city | Iceland | 64.13 | -20.72 | 282 | 0 | |
| Thoroddsstadhir | city | Iceland | 63.97 | -21.28 | 164 | 310 | |
| Thoroddstadhir | city | Iceland | 63.97 | -21.28 | 164 | 310 | |
| Thorustadhir | city | Iceland | 63.95 | -21.07 | 75 | 1821 | |
| Thrandarholt | city | Iceland | 64.03 | -20.35 | 187 | 0 | |
| Thufa | city | Iceland | 63.97 | -21.20 | 26 | 2113 | |
| Thura | city | Iceland | 63.97 | -21.27 | 32 | 470 | |
| Thverspyrna | city | Iceland | 64.15 | -20.22 | 649 | 22 | |
| Tjörn | city | Iceland | 64.22 | -20.48 | 321 | 75 | |
| Toftir | city | Iceland | 63.85 | -20.98 | 22 | 705 | |
| Torfabaer | city | Iceland | 63.83 | -21.70 | 19 | 0 | |
| Torfabær | city | Iceland | 63.83 | -21.70 | 19 | 0 | |
| Torfastadhir | city | Iceland | 64.03 | -21.03 | 177 | 43 | |
| Torfastadhir | city | Iceland | 64.17 | -20.50 | 183 | 154 | |
| Torfastadur | city | Iceland | 64.17 | -20.50 | 183 | 154 | |
| Torfastaðir | city | Iceland | 64.17 | -20.50 | 183 | 154 | |
| Torfastaðir | city | Iceland | 64.03 | -21.03 | 177 | 43 | |
| Tradharholt | city | Iceland | 63.83 | -21.03 | 0 | 1050 | |
| Traðarholt | city | Iceland | 63.83 | -21.03 | 0 | 1050 | |
| Tungufell | city | Iceland | 64.28 | -20.17 | 580 | 71 | |
| Tóttir | city | Iceland | 63.85 | -20.98 | 22 | 705 | |
| Tún | city | Iceland | 63.93 | -20.92 | 68 | 741 |