 Onyx Choker#7548 | Armor | Uncommon | Level 41 | |
 Onyx Embedded Leggings#21530 | Armor | Epic | Level 60 | |
 Onyx Idol#20867 | Quest | Rare | None | |
 Onyx Ring#7547 | Armor | Uncommon | Level 41 | |
 Onyxia Blood Talisman#18406 | Armor | Epic | None | |
 Onyxia Hide Backpack#17966 | Container | Uncommon | None | |
 Onyxia Scale Breastplate#15141 | Armor | Epic | Level 57 | |
 Onyxia Scale Cloak#15138 | Armor | Rare | Level 55 | |
 Onyxia Tooth Pendant#18404 | Armor | Epic | None | |
 OOX-09/HL Distress Beacon#8704 | Quest | Uncommon | Level 43 | |
| OOX-17/TN Distress Beacon#8623 | Quest | Uncommon | Level 43 | |
| OOX-22/FE Distress Beacon#8705 | Quest | Uncommon | Level 40 | |
 Ooze-covered Bag#3352 | Container | Common | None | |
 Oozing Bag#20768 | Miscellaneous | Common | None | |
 Oozing Eye#223335 | Quest | Uncommon | None | |
 Opal Runestone#4844 | Quest | Common | None | |
 Opaline Medallion#16623 | Armor | Uncommon | None | |
 Opera Ticket#237024 | Miscellaneous | Rare | Level 1 | |
 Optomatic Deflector#9643 | Armor | Uncommon | None | |
 Opulent Scepter#15984 | Armor | Uncommon | Level 51 | |
 Or'Kalar's Head#4551 | Quest | Common | None | |
 Oracle Crystal#6442 | Quest | Common | None | |
 Orange Dye#6261 | Trade goods | Common | None | |
 Orange Hakkari Bijou#19710 | Quest | Rare | Level 58 | |
 Orange Mageweave Shirt#10056 | Armor | Common | None | |
| Orange Martial Shirt#10052 | Armor | Common | None | |
 Orange Murloc Egg#20651 | Miscellaneous | Common | None | |
 Orb Fragments#209800 | Quest | Common | Level 1 | |
 Orb of Corruption#191268 | Consumable | Uncommon | Level 1 | |
 Orb of Dar'Orahil#15108 | Armor | Rare | None | |
 Orb of Des#210765 | Quest | Common | Level 1 | |
 Orb of Draconic Energy#12300 | Quest | Common | None | |
| Orb of Fire#12805 | Armor | Uncommon | None | |
 Orb of Mystic Insight#249394 | Armor | Rare | Level 25 | |
| Orb of Noh'Orahil#15107 | Armor | Rare | None | |
| Orb of Power#4838 | Armor | Uncommon | Level 21 | |
| Orb of Soran'ruk#6898 | Armor | Rare | None | |
 Orb of Souls#249395 | Armor | Rare | Level 25 | |
 Orb of the Darkmoon#19426 | Armor | Epic | Level 60 | |
 Orc Crusher#6093 | Weapon | Uncommon | None | |
