Uir or UIR may refer to: International Broadcasting Union (IBU); Úr, an Old Irish letter University of International Relations United Islamic Republic, a fictional nation in Tom Clancy's book Executive Orders Upper information region, airspace Unity and Renewal, political party in Andorra Unidentified infrared emission Université Internationale de Rabat (International University of Rabat) Quirindi Airport, IATA airport code "UIR"