J
- Johnson Camp
- (Campbell County) Jude Island
- (Kodiak Island Borough) Jute Islands
- (Lowndes County) Jones Islands
- (Yukon-Koyukuk Census Area) Joly Island
- (Yukon-Koyukuk Census Area) Jokinaugh Island
- (Kusilvak Census Area) Johnson Island
- (Kusilvak Census Area) Johnnys Village
- (Kodiak Island Borough) Jug Island
- (Greene County) Junction Island
- (Yukon-Koyukuk Census Area) Junction Island
- (Anchorage Municipality) Justamere Ranch
- (Campbell County) John Island
- (Kodiak Island Borough) Jute Island
- Joe Ward Camp
- (Matanuska-Susitna Borough) John Fitzgerald Kennedy City
- Jensens Camp
- Julius
- (Matanuska-Susitna Borough) Jonesville
- (Southeast Fairbanks Census Area) Jack Wade
- John Herberts Village
- (Lake and Peninsula Borough) Jackrabbit Island
- (Sitka City and Borough) Jacknife Islands
- (Sitka City and Borough) Jacob Rock
- (Sitka City and Borough) Japonski Island
- (Prince of Wales-Hyder Census Area) Jarvis Island
- (Madison County) Jewell Island
- (Ketchikan Gateway Borough) Joe Island
- (Prince of Wales-Hyder Census Area) Joe Island
- (Prince of Wales-Hyder Census Area) Joe Mace Island