Man(lvl-2) - All Over Runescape.
Woman(lvl-2) - All over Runescape.
Goblin(lvl-2) - All over Runescape.
Goblin(lvl-5) - Goblin Village north of Falador.
Mugger(lvl-6) - Varrock and the Ice Cave.
Barbarian(lvl-7) Barbarian Village
Famer(lvl-7) Farms in Lumbridge, Draynor, Falador & Ardougne.
Barbarian Woman(lvl-8) - Barbarian Village.
Al-Kharid Warrior(lvl-9) - Al-Kharid Palace.
Thug(lvl-10) - Edgeville Dungeon, and in lvls 9-10 of the wilderness.
Rock Crabs(lvl-13) - Rellekka.
Rouge(lvl-15) - Wilderness level 51-55.
Thief(lvl-16) - Small alleys in Varrock.
H.A.M Members(lvl-20) - H.A.M Headquarters, West of Lumbridge General Store. Clues can be obtained by pickpocketing H.A.M men (level 20 thieving required) and H.A.M women (level 15 thieving required)
H.A.M Guards(lvl-22) - H.A.M Headquarters, West of Lumbridge General Store.
Banshees(lvl-23) - Slayer Tower, This is a Slayer monster.
Cave Slime(lvl-23) - Lumbridge Dungeon, This is a Slayer monster.
Man/Woman(lvl-24) - This is the human form of werewolf which can be found in Canafis (Morytania).
Minotaur(lvl-27) - Security Stronghold, Vault of War Level 1.
Afflicted(lvl-30-37) - Mort'ton.
Dagannoth Spawn(lvl-42) - Waterbirth Island Dungeon.
Rellekka Citizens(lvl-48) - Rellekka, These include Borrakar, Freidar, Freygerd, Igna, Jennella, Lensa and Lanzig.
Guard(lvl-21) - In all major cities, at entrances etc, and there's some in the Varrock Castle.
Tribesman(lvl-32) - These can be found all over the Karamja Jungle.
Bandit Camp Humans(lvl-34) - Bandit Camp in the Wilderness
Cockatrice(lvl-37) - Slayer Dungeon, Rellekka. This is a Slayer Monster.
Abyssal Leech(lvl-41) - the Abyss.
Pyrefiend(lvl-43) - Slayer Dungeon, Rellekka. This is a Slayer Monster.
Harpie Bug Swarm(lvl-46) - On Karamja's North coast, Northeast of Tai Bwo Wannai Village
Black Guard(lvl-48) - Keldagrim (Dwarven City)
Rellekka Warriors & Market Guards(lvl-48) - Rellekka
Jogre(lvl-53) - Dungeon East of Tai Bwo Wannai Village, and Ardougne Zoo.
Ice Warrior(lvl-57) - There are many of these in the Ice Caves, south of Rimmington, but also some in the high-level west part of the wilderness. Also some in the Ice Maze on White Wolf Mountian.
Abyssal Guardian(lvl-59) - the Abyss.
Paladin(lvl-62) - All over Ardougne
Catablepon(lvl-68) - Security Stronghold, Pit of Pestilence level 3.
Jungle Horror(lvl-70) - Mos Le'Harmless Jungle.
Vampire(lvl-72) - Vampires are found East of Canifis (in Morytania).
Dagannoth(lvl-74) - Under the lighthouse, North of the Barbarian Agility Course.
Giant Skeleton(lvl-80) - Shadow Dungeon, Located in the small fenced-in park just west of the fishing guild. A ring of visibility, obtained during the Desert Treasure quest, is required to see the entrance and enter the dungeon.
Abyssal Walker(lvl-81) - the Abyss.
Dagannoth(lvl-88) - Waterbirth Island Dungeon.
Dagannoth(lvl-92) - Under the lighthouse North of the Barbarian Agility Course.
Wallasalki(lvl-98) - Waterbirth Island Dungeon.
Mummy(lvl-103) - Pyramid in the Al-Kharid Desert.
Giant Rock Crab(lvl-137) - Waterbirth Island Dungeon.
Giant Sea Snake(lvl-149) - Miscellania Dungeon.
Cyclops(lvl-56,76) - These can only be found in the Cyclopes Arena on the third floor of the Warriors' Guild.
Green Dragon(lvl-79) - These can be found South of the Lava Maze in the wilderness, as well as in level 13-14 wilderness on the Western side.
Cave Horror(lvl-80) - Centre dungeon of Mos Le'Harmless
Ankou(lvl-86) - Security Stronghold, Sepulchre of Death level 4.
Greater Demon(lvl-92) - There are a couple of these in the dungeon on the holy island on Entrana, in the Lava Maze and in the Demonic Ruins in level 45 wilderness, and in the Brimhaven Dungeon.
Elf Warrior(lvl-108) - Elf camp in Isafdar
Tyras Guard(lvl-110) - Tyras camp in Tirannwn
Suqah(lvl-111) - Lunar (MoonClan) Isle.
Blue Dragon(lvl-111) - There is one of these under the Hero's Guild. in the members dungeon, as well as the Ogre enclave.
Hell Hound(lvl-122) - These can be found in the members dungeon, in the dungeon east of Ardougne, and in level 50-53 wilderness just south of the Axe hut.
Gorak(lvl-145) - DIR plane of the Fairyrings Network.
Red Dragon(lvl-156) - Lava lake in level 38-41 wilderness, also deep in the Karamja members' dungeon.
Black Dragon(lvl-227) - These are located in the members dungeon, entrance south of taverly, go all the way in, and in the wilderness lave maze.
Bronze Dragon(lvl-131) - These are located in Brimhaven Dungeon, you will have to traverse through many dangers to get to the dragons towards the end in their big cavern.
Iron Dragon(lvl-189) - These are located in Brimhaven Dungeon, you will have to traverse through many dangers to get to the dragons towards the end in their big cavern.
Steel Dragon(lvl-246) - These are located in Brimhaven Dungeon, you will have to traverse through many dangers to get to the dragons towards the end in their big cavern.
Dagannoth Kings(lvl-303) - Waterbirth Island Dungeon.