- South Norwalk, Connecticut
- South Padre Island, Texas
- South Salt Lake, Utah
- South Sioux City, Nebraska
- Southampton, New York
- Southaven, Mississippi
- Southborough, Massachusetts
- Southlake, Texas
- Sparks, Nevada
- Sparks, Oklahoma
- Spartanburg, South Carolina
- Spicewood, Texas
- Splendora, Texas
- Spring Hill, Tennessee
- Spring Valley, New York
- Spring, Texas
- Springdale, Arkansas
- Springdale, Utah
- Springfield, Illinois
- Springfield, Missouri
- Springtown, Texas
- Squaw Valley, California
- St. Amant, Louisiana
- St. Augustine, Florida
- St. Charles, Missouri
- St. Clairsville, Ohio
- St. George, Virginia
- St. Helena, California
- St. Johns, Florida
- St. Joseph, Missouri
- St. Louis Park, Minnesota
- St. Louis, Missouri
- St. Marys, Georgia
- St. Paul, Minnesota
- St. Pete Beach, Florida
- St. Petersburg, Florida
- St. Simons Island, Georgia
- Stafford, Virginia
- Stamford, Connecticut
- Standish, Massachusetts
