- Cornelius
- Cornucopia
- Coronado Shores
- Corvallis
- Cottage Grove
- Cottrell
- Couplets
- Courtrock
- Cousins
- Cove
- Cove Orchard
- Cow Creek
- Cox Island
- Cox Rock
- Coyote Island
- Crab Rock
- Crabtree
- Cranberry Corners
- Crane
- Crawfordsville
- Crescent
- Crescent Lake
- Creston
- Creswell
- Crims Island
- Crockett
- Crooked River Ranch
- Crow
- Crowfoot
- Crowley