William McDougall, Canadian lawyer and politician, Lieutenant Governor of the Northwest Territories (d. 1905)
William McDougall may refer to:
William McDougall (politician, born 1822) (1822–1905), Canadian lawyer and politician from Ontario
William McDougall (Nova Scotia politician) (1816–1886), Canadian shipbuilder and politician from Nova Scotia
William McDougall (Quebec politician) (1831–1886), Canadian lawyer, judge and politician from Quebec
William McDougall (psychologist) (1871–1938), British psychologist and author
William Currie McDougall (1840-1920) Scottish minister and poet, central to the Coatbridge Free Church Scandal
Bill McDougall (born 1966), Canadian ice hockey player