| Orange Ent Pet | | Normal | Hostile | |
| Orange Tabby | 1 | Normal | Hostile | Elwynn Forest |
| Orb of Deception (Dwarf, Female) | 1 | Normal | Both | |
| Orb of Deception (Dwarf, Male) | 1 | Normal | Both | |
| Orb of Deception (Gnome, Female) | 1 | Normal | Both | |
| Orb of Deception (Gnome, Male) | 1 | Normal | Both | |
| Orb of Deception (Human, Female) | 1 | Normal | Both | |
| Orb of Deception (Human, Male) | 1 | Normal | Both | |
| Orb of Deception (Nightelf, Female) | 1 | Normal | Both | |
| Orb of Deception (NightElf, Male) | 1 | Normal | Both | |
| Orb of Deception (Orc, Female) | 1 | Normal | Both | |
| Orb of Deception (Orc, Male) | 1 | Normal | Both | |
| Orb of Deception (Tauren, Female) | 1 | Normal | Both | |
| Orb of Deception (Tauren, Male) | 1 | Normal | Both | |
| Orb of Deception (Troll, Female) | 1 | Normal | Both | |
| Orb of Deception (Troll, Male) | 1 | Normal | Both | |
| Orb of Deception (Undead, Female) | 1 | Normal | Both | |
| Orb of Deception (Undead, Male) | 1 | Normal | Both | |
| Orb of Domination | 1 | Normal | Hostile | |
| Orc Female Winter Reveler | 1 | Normal | Both | |
| Orc Mage | | Normal | Hostile | |
| Orc Male Winter Reveler | 1 | Normal | Both | |
| Orc Warrior | | Normal | Hostile | |
| Orca | 61 | Normal | Hostile | |
| Orcish Orphan | 4 | Normal | Horde | |
| Orendil Broadleaf | 27 | Normal | Alliance | Ashenvale |
| Orenthil Whisperwind | 5 | Normal | Alliance | Teldrassil |
| Orgnil Soulscar | 18 | Normal | Horde | Durotar |
| Orgrimmar Celebrant | 1–60 | Normal | Horde | |
| Orgrimmar Commendation Officer | 55 | Normal | Horde | Orgrimmar |
| Orgrimmar Elite Cavalryman | 61 | Elite | Both | Silithus |
| Orgrimmar Elite Infantryman | 59–60 | Elite | Both | Silithus |
| Orgrimmar Elite Shieldguard | 60–61 | Elite | Both | |
| Orgrimmar Fireeater | 1–60 | Normal | Alliance | Orgrimmar |
| Orgrimmar Grunt | 55 | Normal | Horde | Durotar |
| Orgrimmar Legion Axe Thrower | 60 | Elite | Horde | Silithus |
| Orgrimmar Legion Grunt | 60 | Elite | Horde | Silithus |
| Orgrimmar Legion Hexxer | 60 | Elite | Alliance | |
| Orgrimmar Reveler | 1–60 | Normal | Horde | Durotar |
| Orgrimmar Talent Master | 50 | Normal | Horde | |
| Orgrimmar Wyvern Rider | 60 | Normal | Horde | |
| Orik'ando | 42 | Normal | Horde | Feralas |
| Orm Stonehoof | 45 | Normal | Horde | Mulgore |
| Ormak Grimshot | 60 | Normal | Horde | Orgrimmar |
| Ormer Ironbraid | 25 | Normal | Alliance | Wetlands |
| Ormok | 50 | Normal | Horde | Orgrimmar |
| Ormyr Flinteye | 50 | Normal | Alliance | Ironforge |
| Ornery Plainstrider | 16–17 | Normal | Hostile | The Barrens |
| Oro Eyegouge | 44 | Elite | Both | |
| Orok Deathbane | 5 | Normal | Horde | Orgrimmar |