KMZ may refer to:
- Keyhole Markup Language files when compressed.
- Kievskiy Mototsikletniy Zavod, a Soviet / Ukrainian maker of the Dnepr series of motorcycles.
- Kovrovskiy Mekhanicheskiy Zavod, a Soviet / Russian weapon manufacturer and former maker of the AEK-971 series of rifles.
- Krasnogorskiy Zavod (formerly known as Krasnogorskiy Mekhanicheskiy Zavod), a Soviet / Russian maker of optics and cameras.
- Különleges Műveleti Zászlóalj, the Special Forces of the Hungarian Army.