- Clifford
- Clifton
- Clinton
- Clintonville
- Clough Island
- Clover
- Cloverdale
- Cloverland
- Clubhouse Island
- Clumbs Island
- Clyde
- Clyde
- Clyman
- Clyman Junction
- Cobb
- Cobb Town
- Cobban
- Cochrane
- Coddington
- Colburn
- Colby
- Cold Spring
- Cold Springs
- Coleman
- Coleman Islands
- Coles Island
- Colfax
- Colgate
- Colin Island
- Collins