- Steamboat Rock
- Stephens
- Stewart Lenox
- Submarine Rock
- Summer Lake
- Summit
- Sumner
- Sunny Valley
- Sunnycrest
- Sunnydale
- Sunnyridge
- Sunnyside
- Sunnyside
- Sunriver
- Sunset
- Sunset
- Sunset Beach
- Suntex
- Suplee
- Surf Pines
- Surprise Valley
- Susanville
- Suver
- Suzy Island
- Svensen
- Svensen Island
- Svensen Junction
- Swan Island
- Swegle
- Swisshome