C
- (Prince of Wales-Hyder Census Area) Chasina Island
- (Sitka City and Borough) Isla de Chichagof
- (Perry County) Cenotaph Island
- (Ketchikan Gateway Borough) Cedar Island
- (Madison County) Clark Island
- (Madison County) Christmas Island
- (Haines Borough) Chilkat
- (Haines Borough) Chilkat Islands
- (Perry County) Chimney Rock
- (Perry County) Chock Island
- (Madison County) Christmas Island
- (Prince of Wales-Hyder Census Area) Clam Island
- (Ketchikan Gateway Borough) Clam Island
- (Prince of Wales-Hyder Census Area) Clam Island
- (Sitka City and Borough) Clam Island
- (Prince of Wales-Hyder Census Area) Clam Island
- (Prince of Wales-Hyder Census Area) Clare Island
- (Ketchikan Gateway Borough) Clover Pass
- (Ketchikan Gateway Borough) Clover Island
- (Madison County) Cloverleaf Island
- (Prince of Wales-Hyder Census Area) Clump Island
- (Prince of Wales-Hyder Census Area) Clump Island
- (Sitka City and Borough) Cobb Island
- (Prince of Wales-Hyder Census Area) Cob Island
- (Juneau City and Borough) Cohen Island
- (Madison County) Cleft Island
- (Prince of Wales-Hyder Census Area) Coffman Island
- (Juneau City and Borough) Coghlan Island
- (Prince of Wales-Hyder Census Area) Cole Island
- (Perry County) Colt Island