List of places in Alaska (O)
This list of cities, towns, unincorporated communities, counties, and other recognized places in the U.S. state of Alaska also includes information on the number and names of counties in which the place lies, and its lower and upper zip code bounds, if applicable.
| Name of place | Number of counties | Principal county | Lower zip code | Upper zip code |
|---|---|---|---|---|
| Ohogamiut | 1 | Kusilvak Census Area | ||
| Old Anderafski | 1 | Kusilvak Census Area | 99658 | |
| Old Chatanika | 1 | Fairbanks North Star Borough | ||
| Old Harbor | 1 | Kodiak Island Borough | 99643 | |
| Old Kvichak | 1 | Dillingham Census Area | ||
| Old Minto | 1 | Yukon-Koyukuk Census Area | ||
| Old Ninilchik | 1 | Kenai Peninsula Borough | ||
| Old Rampart | 1 | Yukon-Koyukuk Census Area | ||
| Old Tyonek | 1 | Kenai Peninsula Borough | 99682 | |
| Old Valdez | 1 | Valdez-Cordova Census Area | ||
| Olive Cove | 1 | Wrangell-Petersburg Census Area | ||
| Olnes | 1 | Fairbanks North Star Borough | 99701 | |
| Ophir | 1 | Yukon-Koyukuk Census Area | ||
| Orca | 1 | Valdez-Cordova Census Area | 99574 | |
| Oscarville | 1 | Bethel Census Area | 99559 | |
| Oskawalik | 1 | Bethel Census Area | ||
| Outer Ketchikan | 1 | Prince of Wales-Outer Census Area | ||
| Ouzinkie | 1 | Kodiak Island Borough | 99644 |