William McDougall
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