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

See also

  • Allison Williams (disambiguation)