United States of America populated cities
- Seattle
- Sebastopol, California
- Second Mesa
- Sedona, Arizona
- Sentinel Butte
- Shade Gap
- Shady Cove
- Shady Dale
- Shady Point
- Shady Spring
- Sharon Springs
- Shaw Island
- Sheffield Lake
- Shell Knob
- Shelter Island Heights
- Shingle Springs
- Shreveport, Louisiana
- Sierra City
- Sierra Vista
- Sioux Center
- Sioux City, Iowa
- Sioux Falls, South Dakota
- Sioux Rapids
- Sitka
- Skagway
- Sleepy Eye
- Smiths Grove
- Smiths Station
- Social Circle
- Soldiers Grove
- Somers Point
- Sound Beach
- South Bend
- South Berwick
- South Boardman
- South Bound Brook
- South Burlington
- South Dartmouth
- South Deerfield
- South Dos Palos
- South El Monte
- South Elgin
- South Gate
- South Greenfield
- South Hadley
- South Heart
- South Houston
- South Hutchinson
- South Jordan
- South Lake Tahoe