| South Renovo, PA (Borough) |
| South River, NJ (Borough) |
| South Rock Island Township, IL (Township) |
| South Rockwood, MI (Village) |
| South Roscoe, KS (Township) |
| South Ross Township, IL (Township) |
| South Roxana, IL (Village) |
| South Russell, OH (Village) |
| South Salem, OH (Village) |
| South Salem, KS (Township) |
| South Salt Lake, UT (City) |
| South San Francisco, CA (City) |
| South Seward, KS (Township) |
| South Sharps Creek, KS (Township) |
| South Shenango Township, PA (Township) |
