Kau or KAU may refer to:
- Kau, Hawaii, the southernmost district on the island of Hawaii
- Kau River, Mizoram, India
- Karlstad University
- Kenya African Union
- Kerala Agricultural University
- King Abdulaziz University, Jeddah, Saudi Arabia
- King Abdullah University, Thual, Saudi Arabia
- Korea Aerospace University, Goyang, South Korea