Dame Margaret Blackwood DBE (26 April 1909 – 1 June 1986) was an Australian botanist and geneticist.

She attended the University of Melbourne and lectured there for the majority of her career, becoming deputy chancellor after her academic retirement.

She was appointed Dame Commander of the Order of the British Empire in 1981 and was inducted posthumously into the Victorian Honour Roll of Women in 2001.

[4] During the Second World War, Blackwood enrolled in the Women's Auxiliary Australian Air Force (WAAAF) in 1941.

[1] Blackwood returned to the University of Melbourne upon her discharge from the WAAAF in 1946 as a biology lecturer and dean of women.