| Carbondale Township, PA (Township) |
| Carbondale Township, IL (Township) |
| Cardiff, AL (Town) |
| Cardin, OK (Town) |
| Cardington, OH (Village) |
| Cardington Township, OH (Township) |
| Cardwell, MO (City) |
| Carefree, AZ (Town) |
| Carencro, LA (City) |
| Carey, OH (Village) |
| Carey, ID (City) |
| Carey Town, WI (Town) |
| Caribe Palm Community Development District, FL (CDD) |
| Caribou, ME (City) |
| Caribou, MN (Township) |
