William Arthur

William Arthur may refer to:


 * William Arthur (botanist) (fl. 1715), Scottish botanist
 * William Arthur (clergyman) (1796–1875), Irish-born American Baptist minister and father of President Chester A. Arthur
 * William Arthur (minister) (1819–1901), Wesleyan Methodist minister and author
 * William Arthur (mathematician) (1894–1979), British mathematician
 * William Brian Arthur (born 1945), a.k.a. W. Brian Arthur, Irish economist
 * William Evans Arthur (1825–1897), U.S. politician
 * William Arthur (Royal Navy) (1830–1886), British naval officer
 * William Hemple Arthur (1856–1936), American general and doctor
 * Bill Arthur (1918–1982), Australian politician