| Name | CR | Type | Environment |
| Jakkerant | 5 | magical beast (aquatic) | any land or water (Utraneus) |
| Jinsul, Jinsul Base Commander | 5 | monstrous humanoid | any |
| Jinsul, Jinsul Warrior | 1 | monstrous humanoid | any |
| Joltvine | 1 | plant | any land (Weydana-4) |
| Jubsnuth | 9 | animal | any temperate (former kishalee worlds) |
| Jububnan, Raconteur | 8 | monstrous humanoid | any |
| Jububnan, Traveler | 2 | monstrous humanoid | any |