- Camp Logan
- Camp Point
- Camp Travis
- Campbell
- Campbell
- Campbell
- Campbell Hill
- Campbells Island
- Campbells Island
- Campton
- Campton Pines
- Campus
- Candlewick Lake
- Canton
- Canton Crossing
- Cantrall
- Capitol Oaks
- Capri Village
- Capron
- Carbon
- Carbon Cliff
- Carbon Hill
- Carbondale
- Cardiff
- Cardinal Court
- Carillon
- Carle Springs
- Carlinville
- Carlock
- Carlsburg