Kau or KAU may refer to:
- Kau (bull), a legendary bull in Meitei mythology
- Kau, Hawaii, the southernmost district on the island of Hawaii
- Kauhava Airfield, an airport in Kauhava, Finland
- Kau River, Mizoram, India
- Kõue Manor or Kau, in Estonia
- Karlstad University
- Kenya African Union
- Kerala Agricultural University
- King Abdulaziz University, Jeddah, Saudi Arabia
- Korea Aerospace University, Goyang, South Korea
