- Conway Island
- Cooglegong
- Cookernup
- Coolboogin
- Coolgardie
- Coolimba
- Coolup
- Coomalbidgup
- Coomberdale
- Coon Siding
- Coonabidgee
- Coonana
- Coondle
- Coorow
- Coral Bay
- Cordering
- Corinthia
- Corrigin
- Cosmo Newbery
- Cossack
- Cottesloe
- Courtenay
- Courtlea
- Cowalellup
- Cowaramup
- Cowcowing
- Cowerdup
- Cowerup
- Coyrecup
- Cramphorne