Known goblin barons
-  , a goblin leader of the Blackwater Raiders headquartered in Booty bay, st the south end of Stranglethorn Vale.
Elementals appear to have a class system, with Baron being one of the positions.
- [24+] , a water elemental in Blackfathom Deeps.
- [58+] , a fire elemental usually encountered at the central crater of Un'Goro Crater
- [?? Boss] , a fire elemental boss in Molten Core.
- [?? Boss] <Abyssal High Council>, a mountain giant encountered in Silithus.
Death Knight Barons
Many death knights appear to be Barons although whether they were actual barons in life or if they adopted the title for themselves is up for debate.
- , a powerful death knight once responsible for Scourge forces in Stratholme, and member of the Four Horsemen in Naxxramas.
- Baron Perenolde
- Others: Baron Bloodbane, Baron Felblade, Baron Frostfel, Baron Morte. (They are random heros in Warcraft III: Reign of Chaos.)
-  <Southsea Freebooters>, a human captain of a pirate ship along the Merchant Coast of The Barrens.
- [070+] Baron Rafe Dreuger, a human ghost in Karazhan.
-  Baron Sablemane, a mysterious human near the arena in Blade's Edge Mountains.
- [20+] Baron Silverlaine, a human ghost mini-boss in Shadowfang Keep.
-  Baron Vardus, a human leader who directs Syndicate camps in the foothills of the Alterac Mountains.
- Void Baron Galaxis
- Baron Ashbury