G
- (Sumter County) Garden Island
- (Yukon-Koyukuk Census Area) Garden Island
- (Fairbanks North Star Borough) Garden Island
- (Aleutians West Census Area) Gareloi Island
- (Aleutians West Census Area) Gargoyle Islands
- (Yukon-Koyukuk Census Area) Garnet Island
- (Kodiak Island Borough) Geese Islands
- (Yukon-Koyukuk Census Area) Gemodedon Island
- (Bethel Census Area) Georgetown
- (Kodiak Island Borough) Ghost Rocks
- (Greene County) Glacier Island
- (Anchorage Municipality) Glen Alps
- (Campbell County) Glen Island
- (Matanuska-Susitna Borough) Gold Creek
- (Greene County) Golden
- (Campbell County) Goloi Island
- (Bethel Census Area) Goodnews Mining Camp
- (Campbell County) Goose Island
- (Greene County) Goose Island
- (Kusilvak Census Area) Goose Island
- (Fairbanks North Star Borough) Goose Island
- (Fairbanks North Star Borough) Graehl
- (Aleutians West Census Area) Gramp Rock
- (Anchorage Municipality) Grandview Gardens
- (Kenai Peninsula Borough) Granite Island
- (Sumter County) Grass Island
- (Greene County) Grass Island
- (Kenai Peninsula Borough) Grass Island
- (Dillingham Census Area) Grassy Island
- (Lake and Peninsula Borough) Grassy Island