Ruapehu may refer to:
- Mount Ruapehu, the highest mountain in the North Island of New Zealand
- Ruapehu District, the local government area that covers much land generally west and south of Mount Ruapehu, mostly in the headwaters of the Whanganui River
- SS Ruapehu, a 340 passenger steam ship, build 1901, wrecked 1930. Main route was London to Auckland and Wellington and back.