William John Hanna

William John Hanna
Ontario MPP
In office
1902–1919
Preceded byFrederick Forsyth Pardee
Succeeded byJonah Moorehouse Webster
ConstituencyLambton West
Personal details
Born(1862-10-13)October 13, 1862
Adelaide Township, Middlesex County, Canada West
DiedMarch 20, 1919(1919-03-20) (aged 56)
Augusta, Georgia
Political partyConservative
Spouses
Jean Gibson Neil
(m. 1891⁠–⁠1896)
Maud McAdams
(m. 1896)

Children3
William Neil Hanna (b.1895 d. 1918)
Margaret Mary Hanna (b.1897 d.1958)
Katherine Hanna (b.1900)
OccupationLawyer

William John Hanna, KC (October 13, 1862 – March 20, 1919) was a lawyer and political figure in Ontario, Canada. He represented Lambton West in the Legislative Assembly of Ontario from 1902 to 1919 as a Conservative member.

Hanna served as Acting Premier of Ontario from 25 September 1914 to 2 October 1914, after the death of Sir James Whitney, before Sir William Hearst.