- Comical Turn
- Conant
- Concord
- Concrete
- Conda
- Conkling Park
- Connor
- Coolin
- Cooper
- Copeland
- Copperville
- Cora
- Corbin Junction
- Cormorant Island
- Cornwall
- Cornwall
- Corral
- Cottage Island
- Cotterel
- Cotton
- Cottontail Island
- Cottonwood
- Cougar Island
- Coulam
- Council
- Cow Creek
- Cox
- Craig Junction
- Craigmont
- Crane Island