| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Iceboro | city | Maine | United States | 44.11222 | -69.77917 | 118 | 3990 |
| Imnarkuan historical | city | Maine | United States | 44.95361 | -67.1625 | 95 | 859 |
| Indian Landing | city | Maine | United States | 45.20806 | -67.86833 | 498 | 93 |
| Indian Point | city | Maine | United States | 44.38278 | -68.36083 | 45 | 2710 |
| Indian River | city | Maine | United States | 44.57194 | -67.64333 | 45 | 747 |
| Ingalls | city | Maine | United States | 43.98528 | -70.72611 | 905 | 1866 |
| Intervale | city | Maine | United States | 43.95194 | -70.26333 | 98 | 3755 |
| Ireland Corner | city | Maine | United States | 43.81167 | -70.37667 | 298 | 9786 |
| Irish Settlement | city | Maine | United States | 45.65778 | -67.91222 | 570 | 172 |
| Island Falls | city | Maine | United States | 46.00917 | -68.27194 | 511 | 392 |
| Island Park | city | Maine | United States | 44.32111 | -69.88806 | 164 | 5623 |
| Isle Au Haut | city | Maine | United States | 44.07528 | -68.63389 | 200 | 407 |
| Islesboro | city | Maine | United States | 44.30833 | -68.90389 | 32 | 537 |
| Islesford | city | Maine | United States | 44.26194 | -68.23444 | 0 | 819 |
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