- Outer Iliasik Island
- Observation Island
- Old Valdez
- Olsen Island
- Outer Island
- Observation Rock
- Osten Island
- Onion Bay
- Outer Seal Rock
- Olor Island
- Old Iliamna
- Oarlock Island
- Old Kotzebue
- Old Harbor
- Oscarville
- Ouzinkie
- Orr Island
- Owl Island
- O'Neil Island
- Obsechki Island
- Onetree Rock
- Otstoia Island
- Oval Rock
- Outpost Island
- Observation Island
- Onslow Island
- Osier Island
- Otmeloi Island
- Oyle Island
- Old McGrath