- South Carolina1
- South Carolina/Bay Point 1
- South Harwich, Town of Harwich, Barnstable County, Massachusetts, United States1
- Southampton, England, United Kingdom1
- Southampton, Hampshire County, Massachusetts, United States1
- Southern Seas1
- Spring Mill, Montgomery County, Pennsylvania, United States1
- Spuyten Duyvil, Bronx County, New York, United States1
- Sri Lanka1
- St. Johns River, Florida, United States1
- Stapleton, Jefferson County, Georgia, United States1
- Staten Island, Richmond County, New York, United States1
- Stavern, Vestfold, Norway1
- Steiermark (Styria), Austria1
- Steiermark, Austria1
- Strontian, Highland, Scotland, United Kingdom1
- Succasunna, Morris County, New Jersey, United States1
- Sulphur City, Calcasieu Parish, Louisiana, United States1
- Sulphur Springs, Hillsborough County, Florida, United States1
- Sulphur Springs, Tampa, Hillsborough County, Florida, United States1