| Name | Type | Lvl | Zone |
| Jacob | Quest NPC | 65 | Thunder River |
| Jahi | Boss | 23 | Khopsef Province |
| Jan Vermis | Boss | 58 | The Catacombs |
| Jathred the Life Drinker | Boss | 80 | Caravan Raider's Hideout |
| Jealous Prospector | Monster | 40 | Purple Lotus Swamp, Lacheish Plains, Poitain |
| Jocund | Quest NPC | 60 | Field of the Dead |
| Jorgrimm | Boss | 32 | Conall's Valley |
| Jormungands Spawn | Minion | 50 | Ice Cave |
| Jotun Hoar-Mane | Monster | 74 | Aztel's Approach |
| Jotun Ice-Crown | Monster | 74 | Aztel's Approach |
| Jotun Rime-Beard | Monster | 72 | Aztel's Approach |
| Juan | Quest NPC | 45 | Armsman's Tavern |
| Juna the Cook | Quest NPC | 50 | Tarantia Noble District |
| Jungle Ape | 5 | Tortage Beach | |
| Jungle Gorilla | Monster | 5 | White Sands Isle |
| Jungle Tiger | Monster | 9 | White Sands Isle |
| Junia | Quest NPC | 10 | City of Tortage |
| Juvenile Snow Leopard | Monster | 50 | Eiglophian Mountains |
| Juverna | Quest NPC | 80 | Wild Lands of Zelata |
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