Eru may refer to:
- Eru (singer), a K-Pop singer and son of trot Korean singer Tae Jin Ah.
- Eru Ilúvatar, the Elvish name for God in J. R. R. Tolkien's Middle-earth legendarium
- Eru (vegetable), a Cameroonian vegetable prepared from either of two creeping plant species
- Syd Eru, a rugby player of New Zealand
- Eru, a location the The Lone Wolf series
- Wikispecies:Gnetum africanum or Wikispecies:Gnetum buchholzianum.
- eru is the Indo-European copula in Old Norse
- Eru (university), an Egyptian university located in Badr city.
- Eru (Shugo Chara!), an alternative rominziation of El, a character from the manga series Shugo Chara! by Peach-Pit
- L (Death Note), as a romanization
- Eru, Estonia, village in Vihula Parish, Lääne-Viru County, Estonia
ERU may refer to:
- Eastern Rugby Union; see also Eastern Pennsylvania Rugby Union
- Emergency Response Unit (disambiguation), specialist teams at various organizations
- Emission Reduction Unit, a credit giver under Joint Implementation equivalent to one tonne of CO2 reduction
- Equilibrium rate of unemployment in macroeconomic theory