- Coaledo
- Cobb
- Coburg
- Cochran Islands
- Coffee Island
- Cold Springs
- Cold Springs Junction
- Cole Island
- Cole Island
- Coles Valley
- Colestin
- College Hill
- Colton
- Columbia City
- Columbia Heights
- Comstock
- Concord
- Condon
- Conical Rock
- Conical White Rock
- Cook
- Coon Island
- Coos Bay
- Coos River
- Cooston
- Copper
- Coquille
- Coquille Rock
- Corbett
- Corey Hill