 Hive Outpost | Liberty Bay | 130–140 | SwarmerInsectoid WorkerCrawler+9 |
 Horestis Tomb | Ankrahmun | 20 | HyaenaNomad (Basic)Ghoulish Hyaena+17 |
 Hot Spot | Kazordoon | 90–110 | VulcongraMassive Fire ElementalDragon Lord |
 Hrodmir Quara Scout Caves | Svargrond | 40–45 | Quara Mantassin ScoutQuara Constrictor ScoutQuara Predator Scout+2 |
 Hrodmir Stone Golem Caves | Svargrond | 15–20 | GargoyleStone Golem |
 Hunter Camp | Port Hope | — | PoacherHunter |
 Hyaena Lairs | Darashia | 200 | LichWerehyaenaWerehyaena Shaman |
 Hydra Hill | Port Hope | 75–80 | Hydra |
 Hydra Mountain | Port Hope | 75–85 | Stone GolemHydra |
| Ice Sphere | Edron | 80 | Slick Water ElementalRoaring Water ElementalIce Overlord |
 Ice Witch Temple | Svargrond | 60–80 | Ice GolemIce WitchCrystal Spider+2 |
 Iksupan | Port Hope | 150 | Cursed ApeIks AucarIks Pututu+3 |
 Iksupan Last Stand | Port Hope | 400 | Iks YapunacMitmah SeerMitmah Scout |
 Iksupan Occupied Sanctuary | Port Hope | 400 | Mitmah SeerMitmah ScoutIks Yapunac |
| Iksupan Undercity | Port Hope | 400 | Iks YapunacMitmah ScoutMitmah Seer+4 |
| Iksupan Waterways | Port Hope | 400 | Iks YapunacMitmah ScoutMitmah Seer+1 |
 Inner Sanctum | Farmine | 190 | Draken AbominationGhastly DragonUndead Dragon+6 |
 Inukaya | Svargrond | 25–30 | PenguinRatWinter Wolf+4 |
 Isle of Ada | Edron | — | DeerStagRaubritter Chastener+8 |
 Isle of the Kings | Carlin | 20 | RabbitDogPig+14 |
 Isle of the Mists | Venore | 25 | FernfangWar Wolf |
 Issavi Sewers | Issavi | 300–350 | Priestess of the Wild SunBlack Sphinx AcolyteBurning Gladiator |
 Jaccus Maxxen's Dungeon | Rathleton | 200 | Rot ElementalBlood BeastMetal Gargoyle+14 |
 Jaded Roots | Northern Darama | — | Sopping CorpusBloated Man-MaggotMycobiontic Beetle+2 |
| Jakundaf Desert | Kazordoon | 7–8 | DeerSnakeBug+2 |
 Jotunar | Svargrond | 40–45 | Frost GiantFrost GiantessMammoth |
 Kazordoon Dragon Lair | Kazordoon | 40–55 | Dragon |
| Kazordoon Minotaurs | Kazordoon | 15–20 | DeerSnakeSpider+9 |
 Kendram Benson's Grave | Rookgaard | 7 | SpiderPoison SpiderSkeleton+3 |
 Kha'zeel Dragon Lairs Kha'labal | Ankrahmun | 25–40 | ScorpionDragonDragon Lord+1 |
 Kha'zeel Dragon Lairs Tiquanda | Port Hope | 40–50 | Dragon HatchlingDragonDragon Lord+1 |
 Kha'zeel Scarab Lair | Ankrahmun | 60–80 | LarvaScarabAncient Scarab |
 Killer Caiman Cave | Farmine | 60–70 | Killer Caiman |
 Kilmaresh Catacombs | Issavi | 300–350 | Crypt WardenSphinxPriestess of the Wild Sun+2 |
 Kilmaresh Central Steppe | Issavi | 250–300 | SeagullFlamingoCrocodile+12 |
| Kilmaresh Mountains | Issavi | 250–300 | Priestess of the Wild SunBlack Sphinx AcolyteBurning Gladiator+2 |
 Kilmaresh Southern Steppe | Issavi | 250–300 | Young GoannaAdult GoannaSphinx+2 |
 Krailos Ruins | Rathleton | 110 | Undead GladiatorNightmare scionNightmare |
 Krailos Spider Lair | Rathleton | 100 | Wailing WidowBrimstone BugGiant Spider |
| Krailos Steppe | Rathleton | 70–80 | Dragon HatchlingClompOgre Shaman+12 |
 Krimhorn | Svargrond | 35–45 | Barbarian BrutetamerBarbarian BloodwalkerBarbarian Headsplitter+3 |
 Laguna Islands | Liberty Bay | 27–30 | AmazonAzure FrogCrab+10 |
 Lair of the Treeling Witch | Edron | 30 | BugSwamplingLeaf Golem+3 |
| Larva Caves | Ankrahmun | 13–15 | LarvaScarabAncient Scarab |
 Last Sanctum | Edron | 100 | WerefoxWerebadgerWerewolf+2 |
 Lich Hell | Liberty Bay | 90 | GhostMummyDemon Skeleton+6 |
 Lion Sanctum | Darashia | 250 | White LionWerelionWerelioness+4 |
 Lion's Rock | Darashia | 60–70 | CobraLarvaScorpion+10 |
 Lost Mines | Edron | 7–8 | RatUndead Mine WorkerUndead Prospector |
 Lower Drainage Area | Rathleton | 150 | Glooth AnemoneHumongous FungusHideous Fungus |