C
- (Matanuska-Susitna Borough) Cottonwood
- (Campbell County) Cove Island
- (Nome Census Area) Cowanesque Rock
- (Sumter County) Crafton Island
- (Lowndes County) Crescent Island
- (Yukon-Koyukuk Census Area) Crescent Island
- (Yukon-Koyukuk Census Area) Crescent Island
- (Aleutians West Census Area) Crone Island
- (Yukon-Koyukuk Census Area) Cronin Island
- (Kenai Peninsula Borough) Cronin Island
- (Kodiak Island Borough) Crooked Island
- (Dillingham Census Area) Crooked Island
- (Campbell County) Cross Island
- (Lowndes County) Cross Island
- (Campbell County) Crowley Rock
- (Greene County) Crystal Falls
- (Kodiak Island Borough) Cub Island
- (Greene County) Culross Island
- (Lake and Peninsula Borough) Cupcake Island
- (Matanuska-Susitna Borough) Crescent Moon Island
- (Aleutians West Census Area) Chagnagix
- (Yukon-Koyukuk Census Area) Canyon Village
- (Aleutians West Census Area) Chunixsam Hachan Tanaa
- (Aleutians West Census Area) Chiidam Udagan Hachan Tanangis
- (Aleutians West Census Area) Chyaguulax
- (Lake and Peninsula Borough) Cinder River
- (Miller County) Cabin Creek
- (Kusilvak Census Area) Chaniliut
- (Matanuska-Susitna Borough) Chelatna Lodge
- (Aleutians West Census Area) Chernofski