Barrios de Maryland C
- Callaway-Garrison (1)
- Calvert Hills Historic District (12)
- Calverton (3)
- Calverton PG (3)
- Cameron Village (8)
- Camp Springs (1)
- Canton Square (29)
- Cape St Claire (2)
- Carney (4)
- Carroll Park (1)
- Carroll South (2)
- Carrollton (1)
- Cedar Lane Farms (1)
- Cedmont (1)
- Cedonia (1)
- Central Park Heights (11)
- Central Rockville (15)
- Charles Village (52)
- Cherry Hill (6)
- Cheswolde (8)
- Cheverly (2)
- Chevy Chase Lake (10)
- Chevy Chase Terrace (2)
- Chevy Chase Village (2)
- Chillum (42)
- Chinquapin Park-Belvedere (1)
- Christopher (3)
- City Square (4)
- Claremont-Freedom (1)
- Clear Spring/Conococheague (2)
- Cloverly (3)
- Cold Spring (1)
- Colesville (3)
- College Park Woods (5)
- Coppin Heights (10)
- Coral Hills (9)
- Cross Country (1)
- Cross Keys (1)
- Cylburn (2)