- Skerry
- Skillings Corner
- Skinner
- Skowhegan
- Slab City
- Slab City
- Slab City
- Slate Island
- Slins Island
- Sloop Island
- Small Point
- Small Point Beach
- Smalls Island
- Smarts Corner
- Smith Crossing
- Smith Island
- Smith Landing
- Smith Rock
- Smithfield
- Smithton
- Smithville
- Smutty Nose Island
- Smuttynose Island
- Smuttynose Island
- Smyrna Center
- Smyrna Mills
- Snake Island
- Snake Island
- Snake Island
- Snow Corner