William Barbour

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