Haw or HAW may refer to:
- Sissipahaw or Haw people, a former tribe of the Siouan speaking Nations in the American Southeast.
- Nictitating membrane, a transparent or translucent third eyelid on the eyes of some animals
- Haw and gee, directional commands to a draft animal
- Hawaiian language, from its ISO 639 language code
- Haw wars (1865–1890), fought against Chinese quasi-military forces invading parts of Tonkin and Thailand
- Hamburg University of Applied Sciences