Douglas Scott Harkness, (March 29, 1903 – May 2, 1999), was a Canadian politician, teacher, farmer and former Lieutenant Colonel in the Royal Canadian Artillery. He was born in Toronto, Ontario and moved to Calgary, Alberta in 1929. He graduated from the University of Alberta, then farmed and taught school in the vicinity of Red Deer. He taught at Crescent Heights High School until 1939. He fought during the Second World War and in 1943 was awarded the George Medal "in recognition of conspicuous gallantry in carrying out hazardous work in a very brave manner".