The large monsters in Monster Hunter World are all predators in the habitat they reside. They are the objectives of Hunt Quests, Bounties and Investigations and come in various shapes and forms and feature a wide array of abilities and moves. They are all listed below in alphabetical order for easy reference along with their location, species, and their star rating in regards to their difficulty and what they are weak to.
Anjanath
Location: Ancient Forest and the Wildspire Waste
Species: Brute Wyvern
Difficulty: 4
Weak to: Water 3, Ice 2, Thunder 2
Azure Rathalos
Location: Elder's Recess and Ancient Forest
Species: Flying Wyvern
Difficulty: 7
Weak to: Dragon 3, Ice 2
Barroth
Location: Wildspire Waste
Species: Brute Wyvern
Difficulty: 3
Weak to: Water (Muddy Body) 3, Fire (Clean Body) 3
Bazelgeuse
Location: Found in all biomes
Species: Flying Wyvern
Difficulty: 7
Weak to: Thunder 3, Ice 2, Dragon 2
Black Diablos
Location: Wildspire Waste
Species: Flying Wyvern
Difficulty: 7
Weak to: Ice 3, Water 2
Deviljho
Location: Found in all biomes
Species: Brute Wyvern
Difficulty: 6-7
Weak to: Thunder 3, Dragon 3
Diablos
Location: Wildspire Waste
Species: Flying Wyvern
Difficulty: 5
Weak to: Ice 3, Dragon 2, Water 2
Dodogama
Location: Elder's Recess
Species: Fanged Wyvern
Difficulty: 7
Weak to: Thunder 3, Water 2, Ice 2
Great Girros
Location: Rotten Vale
Species: Fanged Wyvern
Difficulty: 4
Weak to: Water 3, Ice 2, Fire 2
Great Jagras
Location: Ancient Forest
Species: Fanged Wyvern
Difficulty: 2
Weak to: Fire 3, Thunder 2, Ice 2
Jyuratodus
Location: Ancient Forest
Species: Fanged Wyvern
Difficulty: 3
Weak to: Water 3, Ice 2, Fire 2
Kirin
Location: Coral Highlands
Species: Elder Dragon
Difficulty: 5-8
Weap to: Fire 3, Water 2, Ice 2
Kulu-Ya-Ku
Location: Ancient Forest and Wildspire Waste
Species: Bird Wyvern
Difficulty: 2
Weak to: Water 3, Fire 2, Thunder 2, Ice 2, Dragon 2
Kushala Daora
Location: Ancient Forest and Elder's Recess
Species: Elder Dragon
Difficulty: 8
Weak to: Thunder 3, Dragon 2
Lavasioth
Location: Elder's Recess
Species: Piscine Wyvern
Difficulty: 7
Weak to: Water 3, Dragon 2, Ice 2
Legiana
Location: Coral Highlands
Species: Flying Wyvern
Difficulty: 5
Weak to: Thunder 3, Fire 2
Nergigante
Location: Elder's Recess
Species: Elder Dragon
Difficulty: 8
Weak to: Thunder 3, Dragon 2
Odogaron
Location: Coral Highlands and Rotton Vale
Species: Fanged Wyvern
Difficulty: 5
Weak to: Ice 3, Thunder 2
Paolumu
Location: Coral Highlands
Species: Flying Wyvern
Difficulty: 4
Weak to: Fire 3, Thunder 2
Pink Rathian
Location: Wildspire Waste and Coral Highlands
Species: Flying Wyvern
Difficulty: 7
Weak to: Dragon 3, Thunder 2
Pukei-Pukei
Location: Ancient Forest
Species: Bird Wyvern
Difficulty: 3
Weak to: Thunder 3, Ice 2, Fire 2
Radobaan
Location: Rotten Vale
Species: Brute Wyvern
Difficulty: 4
Weak to: Dragon 3, Ice 2
Rathalos
Location: Ancient Forest
Species: Flying Wyvern
Difficulty: 5
Weak to: Dragon 3, Thunder 2
Rathian
Location: Ancient Forest and Wildspire Waste
Species: Flying Wyvern
Difficulty: 4
Weak to: Dragon 3, Thunder 2
Teostra
Location: Wildspire Waste and Elder's Recess
Species: Elder Dragon
Difficulty: 8
Weak to: Water 3, Ice 3
Tobi-Kadachi
Location: Ancient Forest
Species: Fanged Wyvern
Difficulty: 3
Weak to: Water 3, Ice 2, Fire 2
Tzitzi-Ya-Ku
Location: Coral Highlands
Species: Bird Wyvern
Difficulty: 4
Weak to: Thunder 3, Ice 3
Uragaan
Location: Elder's Recess
Species: Brute Wyvern
Difficulty: 7
Weak to: Water 3, Dragon 2, Ice 2
Vaal Hazak
Location: Rotten Vale
Species: Elder Dragon
Difficulty: 8
Weak to: Fire 3, Dragon 3
Xeno'jiiva
Location: Elder's Recess
Species: Elder Dragon
Difficulty: 9
Weak to: All elemental type
Zorah Magdaros
Location: Everstream (Only accessible via Storyline)
Species: Elder Dragon
Difficulty: 6
Weak to: Water 3, Dragon 3