| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Siberia | city | Maine | United States | 45.88 | -68.46 | 830 | |
| Sibley Corner | city | Maine | United States | 44.51 | -69.35 | 830 | |
| Sidney | city | Maine | United States | 44.41 | -69.73 | 95 | |
| Silver Ridge | city | Maine | United States | 45.81 | -68.32 | 830 | |
| Silvers Mills | city | Maine | United States | 45.09 | -69.24 | 830 | |
| Silverwood Court | city | Maine | United States | 45.62 | -68.55 | 298 | |
| Simonton Corners | city | Maine | United States | 44.20 | -69.10 | 101 | |
| Simpsons Corner | city | Maine | United States | 44.42 | -69.04 | 150 | |
| Sinclair | city | Maine | United States | 47.17 | -68.27 | 830 | |
| Six Mile Falls | city | Maine | United States | 44.86 | -68.83 | 98 |