| St. Lawrence, PA (Borough) |
| St. Leo , FL (Town) |
| St. Louis, MI (City) |
| St. Lucie County, FL (County) |
| St. Lucie Village, FL (Town) |
| St. Lucie West Services District, FL (CDD) |
| St. Marks, FL (City) |
| St. Martin Parish, LA (County) |
| St. Mary City, KY (City) |
| St. Mary Parish, LA (County) |
| St. Marys, PA (City) |
| St. Marys, IN (Township) |
| St. Marys Township, OH (Township) |
| St. Pete Beach, FL (City) |
| St. Petersburg, FL (City) |
