| St. Clair County, MI (County) |
| St. Clair County, IL (County) |
| St. Clair County, AL (County) |
| St. Clair Shores, MI (City) |
| St. Clair Township, MI (Township) |
| St. Clair Township, OH (Township) |
| St. Clair Township, OH (Township) |
| St. Clair Township, PA (Township) |
| St. Clairsville, PA (Borough) |
| St. Cloud, FL (City) |
| St. Helena Parish, LA (County) |
| St. Ignace, MI (City) |
| St. Ignace Township, MI (Township) |
| St. James Parish, LA (County) |
| St. James Township, MI (Township) |
