William Stephen Bullock (3 August 1865 – 13 November 1936) was a Canadian Baptist minister, businessman, and politician.
Born in Sainte-Pudentienne near Shefford, Canada East, the son of William Henry Bullock, a farmer, and Hanna Chartier, Bullock studied at the mission of Grande-Ligne, the Montreal Normal School, McGill University, and Andover Newton Theological School in Massachusetts.
He ministered in Ottawa, Maskinongé and Saint Pudentienne until 1907.
He then worked as a manager and secretary of the Stanley Tool Company of Canada Limited.
He was appointed to the Legislative Council of Quebec of the division of Wellington on 15 August 1931 and served until his death in St. Pudentienne on 13 November 1936.