UAR is the common abbreviation for the United Arab Republic, a state formed by the union of the republics of Egypt and Syria in 1958.
UAR or Uar may also refer to:
Uar (tribe), a tribe in Central Asia and China Understanding Animal Research, a British advocacy group Unión Argentina de Rugby, the official governing body of rugby union in Argentina Union of African Railways, an organization of African railways United Artists Records, American record label United Artists Releasing, American film distribution joint venture which operated from 2017 to 2023 Genetic code for stop codon ICAO designator for Aerostar Airlines, a Ukrainian airline