James G. Thompson (December 18, 1926 – May 13, 2021) was a Canadian businessman, philanthropist, and sportsman. He was best known for designing and building the Miss Supertest hydroplanes. Thompson was born in London, Ontario to "Colonel" J. Gordon Thompson and Essie McCreery. The couple also had two daughters named Catherine and Essie. His father "Colonel" J. Gordon was a businessman involved in the manufacturing of gasoline pumps, and subsequently the selling of gasoline, a sportsman and a golfer who founded the Sunningdale Golf and Country Club. The Thompson Recreation and Athletic Centre at Western in London, Ontario was named in his honour.