Balthazar can refer to

• One of the Three Wise Men
• In the anime series Neon Genesis Evangelion, one of three parts of the biocomputer located in NERV's First Branch.
• A size of wine bottle, equal to 16 standard bottles, or 12 litres
• A 1909 book by Anatole France
• A 1958 novel by Lawrence Durrell
• Balthazar Getty, great grandson of J. Paul Getty
• Hans Urs von Balthasar - 20th c. Roman Catholic Theologian