Frederick Donald MacKenzie, (December 18, 1882 – October 13, 1970) was a soldier, teacher and Member of Parliament in Canada.
Mackenzie was born in Presqu'île, Ontario and was educated at Owen Sound Collegiate and Vocational Institute and Queen's University where he earned a Bachelor of Arts.
He served during the First World War with the Queen's University Hospital Unit from 1915 to 1916 in Egypt and the Dardanelles.
Following the war, he returned to Canada and settled in Neepawa, Manitoba, where he worked as a teacher and became a school principal.
In the 1935 federal election he ran as a Liberal candidate in Neepawa and was returned to the House of Commons of Canada.