Diogo Pinto de Freitas do Amaral (; 21 July 1941 – 3 October 2019), known as Freitas do Amaral, was a Portuguese politician, writer and law professor. He was Minister of Foreign Affairs from 12 March 2005 to 3 July 2006. He also was the Prime Minister in an acting role from 4 December 1980 through 9 January 1981. He was born in Póvoa de Varzim, Portugal.