R
- (Prince of Wales-Hyder Census Area) Ruth Island
- (Ketchikan Gateway Borough) Ruth Island
- (Madison County) Ruth Island
- (Thomas County) Rynda Island
- (Campbell County) Rabbit Island
- (Kenai Peninsula Borough) Rabbit Island
- (Lake and Peninsula Borough) Rabbit Islands
- (Campbell County) Race Rocks
- (Lake and Peninsula Borough) Radial Island
- (Kenai Peninsula Borough) Ragged Island
- (Anchorage Municipality) Rainbow
- (Greene County) Range Island
- (Campbell County) Range Islet
- (Campbell County) Range Island
- (Kodiak Island Borough) Raspberry Island
- (Aleutians West Census Area) Red Rock
- (Greene County) Reef Island
- (Anchorage Municipality) Rees
- (Kodiak Island Borough) Refuge Island
- (Lake and Peninsula Borough) Reindeer Island
- (Lowndes County) Reindeer Island
- (Lowndes County) Return Islands
- (Aleutians West Census Area) Ringgold Island
- (Aleutians West Census Area) Rip Rock
- (Lake and Peninsula Borough) Road Island
- (Campbell County) Rock Island
- (Southeast Fairbanks Census Area) Rock of Ages
- (Kodiak Island Borough) Rocky Island
- (Kodiak Island Borough) Rocky Islet
- (Greene County) Rocky Island