William Mackenzie, McKenzie, Mckenzie or MacKenzie may refer to:
Artists, musicians, writers and entertainers William Lyon Mackenzie (1795–1861), Scottish-born journalist & rebel in Upper Canada; grandfather of Canadian prime minister William Lyon MacKenzie King William Lyon Mackenzie (fireboat) William Mackay Mackenzie (1871–1952), Scottish historian, archaeologist and writer Will Mackenzie (born 1938), American television director and actor Billy Mackenzie (William MacArthur MacKenzie, 1957–1997), Scottish singer
Politicians and noblemen Bill McKenzie, Baron McKenzie of Luton (1946-2021), English politician William Mackenzie, 1st Baron Amulree (1860–1942), British barrister, public servant and politician William Mackenzie, 5th Earl of Seaforth (died 1740), Scottish nobleman William Albany McKenzie (1928–1991), mayor of Fremantle, Western Australia, and administrator of Christmas Island William Alexander McKenzie (1874–1966), builder and political figure in British Columbia William Forbes Mackenzie (1807–1862), Scottish Conservative politician and temperance reformer William H. MacKenzie (1890–1972), New York assemblyman William McKenzie (Australian politician) (1883–1969), Victorian state politician
Sportsmen Bill MacKenzie (William Kenneth MacKenzie, 1911–1990), Canadian ice hockey player Bill McKenzie (ice hockey) (William Ian McKenzie, born 1949), Canadian ice hockey player Bill McKenzie (footballer) (1889–1983), Australian footballer for Melbourne Bill S. McKenzie (1934–1974), Australian footballer for Richmond Bill McKenzie (rugby league) (1923–1985), New Zealand rugby league player Will MacKenzie (William Ruggles MacKenzie, born 1974), American golfer Billy MacKenzie (motorcyclist) (born 1984), Scottish motocross racer William McKenzie (rugby union) (1871–1943), international New Zealand rugby union player William McKenzie (sailor) (born 1997), New Zealand sailor William Mackenzie (hammer thrower), Scottish athlete
Other people William Mackenzie (contractor) (1794–1851), British civil engineering contractor William Mackenzie (ophthalmologist) (1791–1868), Scottish ophthalmologist
William Mackenzie (railway entrepreneur) (1849–1923), railway contractor and entrepreneur in Canada, the United States, and Brazil William Leslie Mackenzie (1862–1935), doctor in public health Sir Colin Mackenzie (anatomist) (William Colin Mackenzie, 1877–1938), Australian anatomist, benefactor, museum administrator and director William Douglas Mackenzie (1859–1936), American theologian William Gregor MacKenzie (1904-1995), plantsman and gardener William Macdonald Mackenzie (1797–1856), Scottish architect William MacKenzie (missionary) (1897–1972), Australian missionary William McKenzie (missionary) (1861–1895), Canadian missionary William Mackenzie (publisher), publisher of natural history books in the 1870s W. J. M. Mackenzie (William James Millar Mackenzie, 1909–1996), British political scholar William John MacKenzie (1894–?), American flying ace
Characters Will McKenzie (Inbetweeners), fictional character