Immortal King may refer to various items and characters in the Diablo setting:
Characters[]
- Bul-Kathos (referred to as "the Immortal King")
- Worusk (the second "Immortal King")
- Kanai (was to be crowned the "Immortal King", but died before that happened)
Items[]
- Immortal King (an item set in Diablo II)
- Immortal King's Call (an item set in Diablo III)