| City | County | 2026 Pop. ↓ |
|---|---|---|
| Gorham | Cumberland County | 19,895 |
| Gray | Cumberland County | 8,766 |
| Gardiner | Kennebec County | 6,246 |
| Glenburn | Penobscot County | 4,834 |
| Greene | Androscoggin County | 4,595 |
| Greenville | Piscataquis County | 1,807 |
| Gouldsboro | Hancock County | 1,776 |
| Greenbush | Penobscot County | 1,543 |
| Guilford | Piscataquis County | 1,272 |
| Georgetown | Sagadahoc County | 1,105 |
| Garland | Penobscot County | 1,045 |
| Greenwood | Oxford County | 759 |
| Grand Isle | Aroostook County | 354 |
| Gilead | Oxford County | 196 |
| Grand Lake Stream | Washington County | 127 |
| Garfield | Aroostook County | 77 |
| Great Pond | Hancock County | 60 |
| Glenwood | Aroostook County | 4 |