Atu may refer to:

  • Atu, a character in Samoan mythology
  • Atu Bosenavulagi, an Australian rules footballer
  • Atu, Iran, a village in Iran
  • Atu Moli, New Zealand rugby union player
  • Atu'u, a village on Tutuila Island, American Samoa

ATU may refer to:

Organizations

Universities

  • Allameh Tabataba'i University, Iran
  • Arkansas Tech University, United States
  • Atlantic Technological University, Ireland

Other organizations

  • African Telecommunications Union
  • Amalgamated Transit Union, trade union in Canada and the US
  • ATU Network, a caucus group within the Amicus trade union
  • Autoridad de Transporte Urbano or Urban Transport Authority, Lima, Peru
  • Anti-Terrorist Unit (Liberia)
  • Lučko Anti-Terrorist Unit, Croatia
  • Asian Taekwondo Union, the official governing body for Taekwondo in Asia

Other uses

  • Aarne–Thompson–Uther Index, a catalogue of folktale types
  • Abstract Tribe Unique, rap musicians using #ATU hashtag
  • Amphibious Task Unit
  • Antenna tuning unit
  • Autonomous territorial unit, an autonomous type of administrative division in Moldova