- Carmel
- Carmody
- Carnelian Junction
- Carp
- Carpenters Corner
- Carver Beach
- Casco
- Casey
- Cashtown
- Casino
- Casperson
- Castle Danger
- Castle Rock
- Castle Towers Mobile Home Park
- Caven Mobile Home Park
- Cazenovia
- Cedar
- Cedar Beach
- Cedar Grove
- Cedar Island
- Cedar Lake
- Celina
- Cemetery Island
- Cemetery Island
- Center Island
- Center Island
- Centerville
- Central
- Central Lakes
- Cerro Gordo