Donald Methuen Fleming, PC (May 23, 1905 – December 31, 1986) was a Canadian parliamentarian, International Monetary Fund official and lawyer, born in Exeter, Ontario, Canada.

[2][3] He was educated at the University of Toronto and Osgoode Hall Law School.

[2] In 1948, he was a candidate in that year's Progressive Conservative leadership convention, losing to George Drew.

The Speaker expelled Fleming from the House of Commons during the 1956 Pipeline Debate that helped lead to the defeat of the Liberal government of Louis St. Laurent in the 1957 general election.

[3] He was a devout Christian, and was an elder of the Bloor Street United Church in Toronto.