- Conrad
- Chicken Coop Island
- Cook Island
- Cosperville
- Camp Shor
- Cofield Corner
- Carlos
- Crete
- Clinton
- Correct
- Cross Roads
- Carp
- Cuba
- Cunot
- Cincinnati
- Coke Oven Hollow
- Coloma
- Coxville
- Celina
- Campbelltown
- Chandler
- Coats Spring
- Circleville
- Chain-O-Lakes
- Colburn
- Crest Manor Addition
- Camelot Manor Estates
- Clanricarde
- Cobbs Corner
- Coburg