- Cornell
- Country Villa Mobile Home Park
- Cresco
- Ceres
- Clayton Center
- Communia
- Curlew
- Cylinder
- Camanche Island
- Chaney
- Coes Island
- Cook Island
- Country View Mobile Home Park
- Carbon
- Chequest
- Calmar
- Carpenter
- Carson
- Casey
- Center Point
- Charter Oak
- Cincinnati
- Clare
- Clarence
- Clarion
- Clear Lake
- Clearfield
- Clive
- Coalville
- Coburg