Tahu may refer to:
- Tahu, the Toa Nuva of Fire (formerly Toa Mata) in the LEGO BIONICLE line
- The Indonesian and Tamil name for tofu
- Tahu, Palpa, a Village Development Committee in Nepal
- Tahu, Estonia, village in Noarootsi Parish, Lääne County, Estonia; Swedish name: Skåtanäs
- People
- Tahu Hole, New Zealand-born BBC journalist
- Tahu Matheson, New Zealand pianist and conductor
- Timana Tahu, Australian Rugby League and Rugby Union player
- Other
- Tahu Culture