| Sidney Township, MI (Township) |
| Sidon, MS (Town) |
| Sidonia, ND (Township) |
| Sierra County, NM (County) |
| Sierra County, CA (County) |
| Sierra Madre, CA (City) |
| Sierra Vista, AZ (City) |
| Sigel, IL (Town) |
| Sigel, MN (Township) |
| Sigel Town, WI (Town) |
| Sigel Town, WI (Town) |
| Sigel Township, MI (Township) |
| Sigel Township, IL (Township) |
| Signal, SD (Township) |
| Signal Hill, CA (City) |
