José Antonio Viera-Gallo Quesney (born 2 December 1943) is a Chilean politician. Before turning 30, Viera-Gallo was a Member of Congress during the left-wing elected government of president Salvador Allende, representing the Socialist Party of Chile. Following the 1973 coup by General Augusto Pinochet, he was among those persecuted by the new regime. Like other left-wing ousted politicians, he sought refuge in a foreign diplomatic mission, specifically the Apostolic Nunciature, where he lived for over six months.