- Calico Corner
- California
- Carriage Stop
- Casey Highlands
- Casey Village
- Castle Valley
- Centennial Station
- Center Bridge
- Centerville
- Chestnut Ridge Acres
- Clay Ridge
- Cobalt Ridge
- Coppernose
- Cornell
- Cornwell
- Cornwells Heights-Eddington
- Cornwells Manor
- Cottageville
- County Line
- Crabtree Hollow
- Cross Keys
- Croydon Acres
- Croydon Heights
- Chambersburg
- Carbon Center
- Carter
- Christleys Mills
- Claytonia
- Clinton
- Coal Hollow