- Carrolltown Road
- Carsontown
- Carsonville
- Carter
- Cartin
- Cartwright
- Cartwrights Crossing
- Carversville
- Carverton
- Casanova
- Cascade
- Casey Highlands
- Casey Village
- Cashtown
- Cashtown
- Cashtown-McKnightstown
- Cassandra
- Cassel Mill Farms
- Casselman
- Cassville
- Castanea
- Castile
- Castle Fin
- Castle Garden
- Castle Garden
- Castle Rock
- Castle Rock Acres
- Castle Rocks
- Castle Shannon
- Castle Valley