William Beaumont (1785–1853) was a U.S. Army surgeon.
William Beaumont may also refer to:
- Bill Beaumont (born 1952), English rugby player
- William Beaumont, 2nd Viscount Beaumont (1438–1507), English soldier and landowner
- William Spencer Beaumont (1848–1926), British army officer and a member of the London County Council
- William Comyns Beaumont (1873–1956), British journalist, author, and lecturer
- William Beaumont (1427–1453), lord of the manor of Shirwell in North Devon
- William Rawlins Beaumont (1803–1875), Canadian surgeon
- Billy Beaumont (1883–1911), English footballer