| Casner Township, IL (Township) |
| Casnovia, MI (Village) |
| Casnovia Township, MI (Township) |
| Casper, WY (City) |
| Caspian, MI (City) |
| Cass, PA (Township) |
| Cass, PA (Township) |
| Cass, IN (Township) |
| Cass, IN (Township) |
| Cass, MO (Township) |
| Cass, IN (Civil Township) |
| Cass, IN (Township) |
| Cass, IN (Township) |
| Cass, IN (Township) |
| Cass, IN (Township) |
