- Caribou Island
- Caribou Islands
- Chat Island
- Chatham Island
- Cheval Island
- Chisik Island
- Chiswell Island
- Chiswell Islands
- Chugach Islands
- Chugachik Island
- Cohen Island
- Cronin Island
- Cache Island
- Candle Island
- Carlanna
- Carp Island
- Cat Island
- Cedar Island
- Center Islets
- Channel Island
- Channel Islands
- Clam Island
- Clover Island
- Clover Pass
- Cone Island
- Coon Island
- Cow Island
- Cygnet Island
- Cynthia Island
- Camp Island