| Cahokia Township, IL (Township) |
| Cain, IN (Township) |
| Cainsville, MO (City) |
| Cairo, MO (Town) |
| Cairo, GA (City) |
| Cairo, WV (Town) |
| Cairo, NE (Village) |
| Cairo, OH (Village) |
| Cairo, MN (Township) |
| Cairo, IL (City) |
| Cairo, NY (Town) |
| Cajah'S Mountain, NC (Town) |
| Calabasas, CA (City) |
| Calabash, NC (Town) |
| Calais, VT (Town) |
