Rahu is one of the navagrahas (nine planets) in Vedic astrology.
Rahu may also refer to:
- Rahu, Saaremaa, a village in Valjala Commune, Saare County, Estonia
- Rahu River, a river in the Tasman Region, South Island, New Zealand
- Renters and Housing Union, a syndicalist tenants' union based in Australia