K
- (Aleutians West Census Area) Kanaga Island
- (Greene County) Kanak Island
- (Campbell County) Kaniliak
- (Aleutians West Census Area) Kanu Island
- (Lowndes County) Karluk Island
- (Campbell County) Karpa Island
- (Aleutians West Census Area) Kasatochi Island
- (Dillingham Census Area) Kashiagamiut
- (Lake and Peninsula Borough) Kaskanak
- (Kodiak Island Borough) Kateekuk Island
- (Southeast Fairbanks Census Area) Kathakne
- (Yukon-Koyukuk Census Area) Kathaleen Island
- (Kodiak Island Borough) Katmai Rock
- (Campbell County) Kauatka
- (Aleutians West Census Area) Kavalga Island
- (Kusilvak Census Area) Kawokhawik Island
- (Greene County) Kayak Island
- (Kusilvak Census Area) Kazhutak
- (Kodiak Island Borough) Kekur Island
- (Campbell County) Kelly Rock
- (Campbell County) Kennoys Islands
- (Bethel Census Area) Kepangalook
- (Bethel Census Area) Kigigak Island
- (Aleutians West Census Area) Kigul Island
- (Bethel Census Area) Kikartik Rock
- (Bethel Census Area) Kikegtek Island
- (Lowndes County) Kikiktak Islands
- (Bethel Census Area) Kikiktalik Rock
- (Lowndes County) Kikikausgruak Island
- (Bethel Census Area) Kikoojit Rocks