C
- (Yukon-Koyukuk Census Area) Cache Island
- (Aleutians West Census Area) Camel Islet
- (Aleutians West Census Area) Camel Rock
- (Kenai Peninsula Borough) Camel Rock
- (Kodiak Island Borough) Camp Island
- (Anchorage Municipality) Campbell
- (Kenai Peninsula Borough) Caribou Island
- (Kenai Peninsula Borough) Caribou Islands
- (Kenai Peninsula Borough) Caribou Island
- (Aleutians West Census Area) Carlisle Island
- (Yukon-Koyukuk Census Area) Carlo Island
- (Nome Census Area) Carolyn Island
- (Greene County) Cascade Island
- (Aleutians West Census Area) Cascade Rock
- (Aleutians West Census Area) Castle Island
- (Campbell County) Castle Rock
- (Greene County) Castle Island
- (Yukon-Koyukuk Census Area) Cat Island
- (Kodiak Island Borough) Cathedral Island
- (Aleutians West Census Area) Cathedral Rocks
- (Campbell County) Caton Island
- (Aleutians West Census Area) Cave Rock
- (Lake and Peninsula Borough) Central Island
- (Aleutians West Census Area) Chagulak Island
- (Aleutians West Census Area) Chaika Rock
- (Kusilvak Census Area) Chakaktolik
- (Bethel Census Area) Chakwaktolik
- (Lowndes County) Challenge Island
- (Northwest Arctic Borough) Chamisso Island
- (Lake and Peninsula Borough) Chankliut Island