William Barbour may refer to:
William Warren Barbour (1888–1943), United States Senator for New Jersey William Boyle Barbour (1828–1891), Scottish merchant and politician William H. Barbour Jr. (1941–2021), United States federal judge William Barbour Linen Thread Company of Hilden, owned by the family of Milne Barbour Billy Barbour (1865–1900), Scottish footballer
See also William Barber (disambiguation)