William Horne

William, Willie, Bill, or Billy Horne may refer to:

Politics

 * William Horne (British politician) (1774–1860) British member of parliament and Attorney General for England and Wales
 * Bill Horne (born 1948), Canadian politician
 * William C. Horne (b. 1962), Nevada state representative
 * William S. Horne (1936–2022), Maryland politician and judge

Sports

 * William Horne (golfer) (born 1880), English golfer
 * William Horne (footballer) (1885–1930), English football player
 * Billy Horne (1916–1969), American baseball player
 * Willie Horne (1922–2001), English rugby league player

Others

 * Brother William Horne (d. 1540), one of the "Carthusian Martyrs"
 * William Kenneth Horne (1883–1959), British colonial judge and speaker
 * William Horne (tenor) (1913–1983), operatic tenor, notably with the New York City Opera