Mário Viegas Carrascalão (May 12, 1937 – May 19, 2017) was an East Timorese-Indonesian politician and diplomat. Carrascalão, a founder of the Timorese Democratic Union (UDT) in 1974 and the Social Democratic Party (SDP) in 2000, served as the Governor of East Timor from 1983 to 1992 during the Indonesian occupation of the country. However, he re-joined the East Timorese government following the 1999 independence referendum and the transition to independence. He later served as a Deputy Prime Minister within the IV Constitutional Government of then-Prime Minister Xanana Gusmão from 2009 to 2010.