| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Idlewell | city | Massachusetts | United States | 42.23056 | -70.95556 | 22 | 99807 |
| Idlewood | city | Massachusetts | United States | 41.63611 | -70.98056 | 91 | 88573 |
| Idylwide | city | Massachusetts | United States | 42.43306 | -71.2525 | 298 | 58056 |
| Indian Heights | city | Massachusetts | United States | 41.75917 | -70.63167 | 3 | 17640 |
| Indian Lake Estates | city | Massachusetts | United States | 42.25556 | -73.05917 | 1535 | 1474 |
| Indian Lands | city | Massachusetts | United States | 41.33333 | -70.81667 | 32 | 445 |
| Indian Orchard | city | Massachusetts | United States | 42.15833 | -72.5 | 196 | 62924 |
| Indian Shore | city | Massachusetts | United States | 41.82361 | -70.91528 | 78 | 7538 |
| Ingleside | city | Massachusetts | United States | 42.175 | -72.63333 | 98 | 82592 |
| Inland Park | city | Massachusetts | United States | 41.73472 | -70.94583 | 137 | 35294 |
| Interlaken | city | Massachusetts | United States | 42.31444 | -73.33111 | 898 | 5922 |
| Ipswich | city | Massachusetts | United States | 42.67917 | -70.84167 | 49 | 15426 |
| Ironstone | city | Massachusetts | United States | 42.02833 | -71.61111 | 275 | 16888 |
| Island | city | Massachusetts | United States | 42.24722 | -71.80417 | 449 | 135205 |
| Island Creek | city | Massachusetts | United States | 42.0125 | -70.725 | 32 | 24690 |
| Islington | city | Massachusetts | United States | 42.22361 | -71.19028 | 118 | 103768 |
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