- Cabin John
- Calverton
- Camp Springs
- Cape Saint Claire
- Capitol Heights
- Carney
- Catonsville
- Cavetown
- Cecilton
- Chance
- Charlotte Hall
- Chesapeake Beach
- Chesapeake City
- Chestertown
- Cheverly
- Chevy Chase
- Chevy Chase Section Five
- Chevy Chase Section Three
- Chevy Chase View
- Chevy Chase Village
- Chewsville
- Chillum
- Church Creek
- Clear Spring
- Clover Hill
- Cloverly
- Cockeysville
- Colesville
- College Park
- Colmar Manor