Barrios de Maryland C
- Cabin John (1)
- Callaway-Garrison (2)
- Calvert Hills Historic District (14)
- Calverton (3)
- Calverton PG (2)
- Cameron Village (2)
- Camp Springs (3)
- Canton Square (38)
- Capitol Heights (4)
- Carderock (1)
- Carney (1)
- Carroll Park Manor (1)
- Carroll South (1)
- Carrollton (2)
- Catonsville (16)
- Central Park Heights (13)
- Central Rockville (18)
- Charles Village (45)
- Cherry Hill (5)
- Cheswolde (10)
- Cheverly (3)
- Chevy Chase Lake (6)
- Chevy Chase Terrace (1)
- Chevy Chase Village (2)
- Chillum (43)
- Chinquapin Park-Belvedere (1)
- City Square (6)
- Claremont-Freedom (1)
- Clear Spring/Conococheague (4)
- Clinton (9)
- Clover Ridge (1)
- Cloverly (4)
- Cockeysville (23)
- Cold Spring (1)
- Colesville (7)
- College Park (38)
- College Park Woods (6)
- Coppin Heights (16)
- Coral Hills (10)
- Crofton (11)
- Cross Country (1)
- Cylburn (4)