Stewart Charles Hamilton Douglas-Mann (born 6 February 1938 in Sussex, England), an alumnus of St Edmund Hall, Oxford, is a former British rower.
Douglas-Mann competed as the bow in the 1959 Boat Races for Oxford which they won.
Representing the England team, Douglas-Mann won a silver medal in the men's coxless pair with Jonathan Hall at the 1958 British Empire and Commonwealth Games.