A nunchaku is an Okinawan martial arts weapon.

Nunchaku or Nunchuk may also refer to:

• Nunchaku (Isabelle), a tool of the Isabelle proof assistant
• Nunchuk (G.I. Joe), a fictional character in the G.I. Joe universe
• Nunchuk (controller), a Wii Remote expansion

• "Nunchucks", a song by Jay Chou from the 2001 album Fantasy
• "Nunchucks", a song by Doja Cat from the 2014 EP Purrr!