- Cookstown
- Cooneen
- Corbet Milltown
- Corchoney Cross Roads
- Corkey
- Corranny
- Craigavole
- Craigavon
- Craigs
- Craigs Lower
- Craigs Middle
- Craigs Upper
- Cranagh
- Cranley
- Crawfordsburn
- Creagh
- Creevelough
- Creggan
- Creggan
- Crew
- Crew Lower
- Crew Upper
- Crilly
- Crindle
- Crossgar
- Crossmaglen
- Crossnacreevy
- Crumlin
- Culky
- Cullaville