Mizar is a bright star in the constellation Ursa Major.

Mizar may also refer to:

• The Mizar system, for writing mathematical definitions and proofs
• AVE Mizar, a flying car
• USS Mizar, two ships in the United States Navy
• Mizar (band), from North Macedonia
  • Mizar (album), their 1988 debut album
• Mizar (Sabotaggio in mare), a 1954 Italian war film
• Mizar (mountain), mentioned in Psalm 42 of the Bible
• Mizar, the antagonist in the Jet Force Gemini video game
• Mizar, a character in the book The Sandman: Endless Nights
• Epsilon Boötis, another star also called Mizar