- Clear Spring
- Clearview
- Clermont
- Clermont Heights
- Clermont Mobile Home Park
- Cleveland
- Clifford
- Clifton
- Clifton
- Clinton
- Clinton
- Clinton Falls
- Clover Village
- Cloverdale
- Cloverland
- Clunette
- Clymers
- Coal Bluff
- Coal City
- Coal Creek
- Coalmont
- Coatesville
- Coats Spring
- Cobb
- Cobbs Corner
- Coburg
- Cochran
- Coe
- Coesse
- Coesse Corners