Haku may refer to:
Haku is a fictional god in the Dungeons & Dragons roleplaying game. He is part of the Al-Qadim campaign setting that is set within the Forgotten Realms campaign setting.
Haku is a Japanese surname. Notable people with the surname include:
- Shinkun Haku (born 1958), Japanese politician
- Kiyoko Haku or Kiyoko Arai, Japanese manga artist
- Maki Haku (1924–2000)