R
- (Madison County) Roadstead Island
- (Perry County) Robert Island
- (Perry County) Robert Islands
- (Sitka City and Borough) Rockwell Island
- (Haines Borough) Rocky Island
- (Sitka City and Borough) Rogers Island
- (Madison County) Rookery Island
- (Prince of Wales-Hyder Census Area) Rookery Islands
- (Prince of Wales-Hyder Census Area) Rosary Island
- (Thomas County) Rose Island
- (Ketchikan Gateway Borough) Round Island
- (Prince of Wales-Hyder Census Area) Round Island
- (Prince of Wales-Hyder Census Area) Round Island
- (Prince of Wales-Hyder Census Area) Round Island
- (Prince of Wales-Hyder Census Area) Round Island
- (Prince of Wales-Hyder Census Area) Round Island
- (Sitka City and Borough) Round Island
- (Sitka City and Borough) Round Island
- (Sitka City and Borough) Round Island
- (Madison County) Round Island
- (Prince of Wales-Hyder Census Area) Round Islands
- (Perry County) Round Islet
- (Perry County) Round Islets
- (Perry County) Round Rock
- (Madison County) Rowan Bay
- (Sitka City and Borough) Rowe Island
- (Ketchikan Gateway Borough) Roy Island
- (Ketchikan Gateway Borough) Rudyerd Island
- (Perry County) Russell Island
- (Perry County) Romp Island