 Iorwerth Archer (Female) | 1 | 1/102.4 |
 Iorwerth Warrior (Iorwerth Camp) | 1 | 1/102.4 |
 Irina | 1 | 1/2,048 |
 Iron dragon (Standard) | 1 | 1/154.57 |
| Iron rocks | 1 | 32/32,768 |
| Jelly | 1 | 1/128 |
| Jelly (Wilderness Slayer Cave) | 1 | 1/51.2 |
 Jennella | 1 | 1/2,048 |
 Jogre (Normal) | 1 | 1/516 |
 Joseph | 1 | 1/2,048 |
 Jungle horror (Worker) | 1 | 1/516 |
 Juvenile custodian stalker | 1 | 1/103.96 |
 K'ril Tsutsaroth | 1 | 1/156.31 |
 Kalphite Guardian | 1 | 1/99.3 |
 Kalphite Queen (Crawling) | 1 | 1/3,225.6 |
 Kalphite Soldier (Kalphite Lair) | 1 | 1/128 |
 Kalphite Worker | 1 | 1/256 |
 Killerwatt (Idle) | 1 | 1/112 |
 King Black Dragon | 1 | 1/157.54 |
 King Bolren | 6–16 | 10/128 |
 King kurask | 1 | 1/82.67, 3 rolls |
 King Sand Crab (Active) | 1 | 1/512 |
 Kraka | 1 | 1/102.4 |
 Kraken (Kraken) | 1 | 1/256 |
 Kree'arra | 1 | 1/156.31 |
 Ksenia | 1 | 1/2,048 |
 Kurask (Normal) | 1 | 1/82.67 |
 Lanzig | 1 | 1/2,048 |
 Lava dragon | 1 | 1/93.62 |
| Lead rocks | 1 | 32/32,768 |
 Lensa | 1 | 1/2,048 |
| Lesser demon (Regular) | 1 | 1/128 |
| Lesser demon (Wilderness Slayer Cave) | 1 | 1/31.2 |
 Lev | 1 | 1/2,048 |
 Lieutenant Schepbur | 6–16 | 10/128 |
 Liliya | 1 | 1/2,048 |
| Limestone rock | 1 | 32/32,768 |
 Lizard | 1 | 1/85.33 |
 Lizardman shaman (Standard) | 1 | 1/640 |
 Lobstrosity | 1 | 1/157.33 |
 Locust rider (Ranger) | 4 | 3/128 |
| Locust rider (Ranger) | 1 | 1/33.78 |
| Lovakite rocks | 1 | 32/32,768 |
 Mad Angel (Post-quest) | 1 | 1/1,920 |
 Mammoth (Normal) | 1 | 1/154.57 |
 Marble gargoyle | 1 | 1/102.4, 3 rolls |
 Market Guard | 1 | 1/512 |
 Mature custodian stalker | 1 | 1/69.52 |