| Name | Type | Min Level | Max Level | Zone |
| Officer Hraak | Thrax | 11 | 11 | Divide |
| Officer McHenry | 20 | 20 | Wilderness | |
| Officer Varga | Monster | 11 | 11 | Divide |
| Oldscratch | Quest Monster | 13 | 13 | Wilderness |
| Operations Chief Sten Corman | 50 | 50 | Wilderness | |
| Outpost Cmdr Taylor | 28 | 28 | Wilderness | |
| Outpost Cmdr. Russ | Quest NPC | 32 | 32 | Plateau |
| Outpost Commander Randolph | Quest NPC | 0 | 0 | Wilderness |
| Outpost Commander Rogers | 20 | 20 | Wilderness | |
| Overfiend Grimor | Feature Monster | 0 | 0 | Abyss |
| Overseer Cast'ka | Quest Monster | 0 | 0 | Marshes |
| Overseer Fix | 0 | 0 | Marshes | |
| Overseer Hoktul | Feature Monster | 0 | 0 | Abyss |
| Overseer Ifilon | Quest Monster | 0 | 0 | Plains |
| Overseer Korva | 0 | 0 | Marshes | |
| Overseer Krykiax | Quest Monster | 0 | 0 | Howling Maw |
| Overseer Luux | Quest Monster | 0 | 0 | Incline |
| Overseer Naxviek | Quest Monster | 0 | 0 | Ashen Desert |
| Overseer Nivvik | 0 | 0 | Marshes | |
| Overseer Quarm | Quest Monster | 0 | 0 | Plains |
| Overseer Turquar | Quest Monster | 0 | 0 | Incline |
| Overseer Urm | Feature Monster | 0 | 0 | Palisades |
| Overseer Vesh | 0 | 0 | Marshes | |
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