William Sloan

William Sloan may refer to:


 * William Gibson Sloan (1838–1914), Scottish evangelist
 * William Sloan (politician) (1867–1928), Canadian businessman and politician
 * William Elvis Sloan (1867–1961), American inventor
 * William Sloan (baseball) (1886–1931), American baseball player
 * William Glenn Sloan (1888–1987), American inventor and scientist
 * William Boyd Sloan (1895–1970), U.S. judge