Dugald Stewart (December 5, 1862 – November 7, 1932) was a Canadian physician and politician, who served as a member of the House of Commons of Canada from 1911 to 1917.
Born in Upper Musquodoboit, Nova Scotia, the son of John Sprott Stewart and Sarah J. Archibald, Stewart was educated at Pictou Academy and Dalhousie College, receiving a Bachelor of Arts degree in 1886.
After graduating, he settled in Bridgewater, Nova Scotia and started a medical practice.
He was elected to the Town Council of Bridgewater in 1901 and was mayor for four successive terms from 1907 to 1910.
Stewart served as a major in the military headquarters at Halifax during World War I, taking part in the examination and care of recruits from the Atlantic provinces.