- Ohogamiut
- Okok Point
- Old Andreafsky
- Old Camp
- Old Cutoff Trading Post
- Old Minto
- Old Rampart
- Old Saulich
- Old Tyonek
- Olnes
- Omilak
- Ophir
- Orca
- Oregon
- Oskawalik
- Otter
- Ogangen Island
- Ogchul Island
- Ogliuga Island
- Oglodak Island
- Old Man Rocks
- Otter Island
- Outer Rock
- Outer Rock
- Outer Signal
- Oronikowaktalik Rock
- Olga Islands
- Olga Rock
- Omega Island
- Operl Island