Seán MacBride (26 January 1904 – 15 January 1988) was an Irish Republican activist, politician, and diplomat who served as Minister for External Affairs from 1948 to 1951, Leader of Clann na Poblachta from 1946 to 1965 and Chief of Staff of the IRA from 1936 to 1937. He served as a Teachta Dála (TD) from 1947 to 1957.
Rising from a domestic Irish political career, he founded or participated in multiple international organisations of the 20th century, including the United Nations, the Council of Europe and Amnesty International. He received the Nobel Peace Prize in 1974, the Lenin Peace Prize for 1975–1976 and the UNESCO Silver Medal for Service in 1980.