William Belknap may refer to:
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William W. Belknap (1829–1890), lawyer, soldier, government administrator and the United States Secretary of War
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William G. Belknap
William Goldsmith Belknap (September 7, 1794 – November 10, 1851), a career soldier in the United States Army, was brevetted three times for service in three wars, attained the rank of brigadier general by brevet, and served as commandant of F ...
(1794–1851), his father, United States Army general
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William Richardson Belknap
William Richardson Belknap (March 28, 1849 – June 2, 1914), for 28 years was president of the Belknap Hardware and Manufacturing Company''The Cincinnati Enquirer'', June 2, 1914, p. 2. based in Louisville, Kentucky, one of the largest hardware Am ...
(1849–1914), president of the Belknap Hardware and Manufacturing Company
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William Burke Belknap (1885–1965), his son, American entrepreneur
{{hndis, Belknap, William