WZ

WZ may refer to:
* The WZ sex-determination system, also known as the ZW sex-determination system.
* Swaziland (FIPS 10-4 country code)
* An abbreviation for the German city Wetzlar
* An abbreviation for the American band White Zombie.
* WinZip, computer file compression software
* WiktionaryZ, a new wiki project
* An abbreviation for the Korean online gaming developer Wizet. Also a file extension created by them (.wZ)
* WZ theory, a technique for simplifying certain combinatorial summations in mathematics.