| Sidney, AR (Town) |
| Sidney, NE (City) |
| Sidney, ND (Township) |
| Sidney, IN (Town) |
| Sidney, MT (City) |
| Sidney, ME (Town) |
| Sidney Township, IA (Township) |
| Sidney Township, IL (Township) |
| 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) |
