SIU or Siu may mean:

People

  • Shao, a Chinese surname, sometimes transliterated as Siu
  • Xiao (surname), a Chinese surname, sometimes transliterated as Siu
  • Siu, a god-hero of Torres Strait Islander people
  • Slave In Utero, the pen name of Lee Jong-hui, author of the South Korean webcomic Tower of God

Organizations

  • Scotland in Union, a Scottish Unionist advocacy group
  • Seafarers International Union of North America, an organization of labor unions
  • Shinawatra University, in Bangkok, Thailand
  • Special Investigating Unit, South African law enforcement agency
  • Symbiosis International University, a private deemed university in India
  • Southern Illinois University, a university system in the United States
  • Southern Illinois University Carbondale, the system's flagship university

Media

  • S.I.U. (film), a 2011 South Korean action film
  • SIU, a 2019 Vocaloid album

Transport

  • Siuna Airport in Nicaragua (IATA Code)
  • Segment of Independent Utility, a highway engineering term for divisions of large-scale construction projects; see

Other uses

  • "Siu", a goal celebration by Cristiano Ronaldo

See also

  • Special Investigations Unit