- Clontarf
- Cloquet
- Cloquet Island
- Clotho
- Cloverdale
- Cloverleaf Mobile Home Community
- Cloverton
- Clyde
- Coates
- Cobden
- Coffee Pot Landing
- Cohasset
- Coin
- Cokato
- Colby
- Cold Spring
- Coleman Island
- Coleraine
- Coleraine Junction
- Collegeville
- Collins Island
- Collis
- Cologne
- Colonial Manor Mobile Home Park
- Colony Court
- Columbia Heights
- Columbus
- Comber Island
- Comet Island
- Comfrey