Zax may refer to:
- Andy Zax, music producer, historian, and information archivist
- The Zax, a pair of Dr. Seuss characters from The Sneetches and Other Stories
- Zax, a cartoon character used by Duke Power to educate children
- Zax (tool), a tool used for pruning slate roofing tiles
- Zax: The Alien Hunter, a video game
- Zax, the flying robot from the movie Benji, Zax & the Alien Prince
