Magi or Magus may refer to:

• The Magi were religious shamanist priests (Magus singular)

• The computer animation company Mathematical Applications Group, Inc., commonly referred to as MAGI
• ''For the novel by John Fowles, see The Magus (novel).
• For the two Marvel Comics characters who share the name, see Magus (comics).
• For the video game character, see Magus (Chrono Trigger).
• For the role-playing game, see The Ascension.''
• For the super computer from the anime Neon Genesis Evangelion, see Neon Genesis Evangelion glossary