William Allison

William Allison may refer to:


 * William Allison (Wisconsin politician) (1827–1882), member of the Wisconsin State Assembly
 * William B. Allison (1829–1908), early leader of the Iowa Republican Party
 * William D. Allison (1861–1923), American lawman
 * William Henry Allison (1838–1934), Canadian politician and school lands commissioner
 * William Outis Allison (1849–1924), mayor of Englewood Cliffs, New Jersey
 * A. M. Williamson (1858–1933), who wrote under the pen name William Allison
 * William Race Allison (1812–1865), Australian politician and landowner