G
- (Perry County) Grave Island
- (Madison County) Grave Island
- (Prince of Wales-Hyder Census Area) Graveyard Island
- (Prince of Wales-Hyder Census Area) Gravina Islands
- (Ketchikan Gateway Borough) Gravina Island
- (Sitka City and Borough) Gray Rock
- (Thomas County) Greys Island
- (Perry County) Greentop Island
- (Madison County) Green Rocks
- (Yakutat City and Borough) Gregson Island
- (Prince of Wales-Hyder Census Area) Grindall Island
- (Sitka City and Borough) Griffith Island
- (Ketchikan Gateway Borough) Guard Islands
- (Ketchikan Gateway Borough) Grouse Rock
- (Prince of Wales-Hyder Census Area) Grouse Rock
- (Sitka City and Borough) Guide Island
- (Prince of Wales-Hyder Census Area) Guide Island
- (Sitka City and Borough) Guertin Island
- (Prince of Wales-Hyder Census Area) Gull Island
- (Sitka City and Borough) Gull Islet
- (Juneau City and Borough) Gull Island
- (Prince of Wales-Hyder Census Area) Gull Island
- (Sitka City and Borough) Gunboat Rock
- (Sitka City and Borough) Gull Rock
- (Sitka City and Borough) Guibert Islets
- (Madison County) Grief Island
- (Greene County) Gage Island
- (Aleutians West Census Area) Gannet Rocks
- (Lake and Peninsula Borough) Garden Island
- (Greene County) Garden Island