L
- (Prince of Wales-Hyder Census Area) Long Island
- (Sitka City and Borough) Long Island
- (Perry County) Long Island
- (Perry County) Long Island
- (Perry County) Long Island
- (Ketchikan Gateway Borough) Lord Islands
- (Ketchikan Gateway Borough) Lord Rock
- (Prince of Wales-Hyder Census Area) Losa Island
- (Sitka City and Borough) Low Island
- (Prince of Wales-Hyder Census Area) Lowrie Island
- (Prince of Wales-Hyder Census Area) Loy Island
- (Sitka City and Borough) Luce Island
- (Prince of Wales-Hyder Census Area) Lulu Island
- (Madison County) Lung Island
- (Sitka City and Borough) Lydonia Island
- (Haines Borough) Lynn Brothers
- (Haines Borough) Lynn Sisters
- (Kodiak Island Borough) Ladder Island
- (Denali Borough) Lagoon
- (Yukon-Koyukuk Census Area) Lady Island
- (Kodiak Island Borough) Lamb Island
- (Yukon-Koyukuk Census Area) Lange Island
- (Anchorage Municipality) Lange
- (Aleutians West Census Area) Large Rock
- (Yukon-Koyukuk Census Area) Lark Island
- (Greene County) Latouche Island
- (Anchorage Municipality) Lawrence
- (Lake and Peninsula Borough) Leader Island
- (Lowndes County) Leavitt Island
- (Yukon-Koyukuk Census Area) Leonard Island