Prof Dugald Black McQuistan FRSE (1879 – 2 April 1946) was a Scottish mathematician.
He was the son of Alexander McQuisten, a baker, and Agnes Leitch, the daughter of a grocer and market gardener.
On 11 December 1895 it was announced in The Scotsman: Dougald McQuistan and Peter Ramsay, two students of the secondary department of Whitehill Public School, Glasgow, have been awarded by the Science and Art Department "Queen's Prizes" to mathematics.After studying Mathematics and Physics at Glasgow University he returned to Whitehill School to teach maths.
[3] In 1925 he became an Associate Professor of Natural Philosophy (Physics) at the Royal Technical College, Glasgow.
His sister Elizabeth Leitch McQuistan, a teacher, confirmed his death.