William Reilly may refer to:
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William K. Reilly
William Kane Reilly (born January 26, 1940) was Administrator of the Environmental Protection Agency under President George H. W. Bush. He has served as president of World Wildlife Fund, as a founder or advisor to several business ventures, and ...
(born 1940), Environmental Protection Agency administrator
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William L. Reilly (1916–2009), American Jesuit and academic
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William J. Reilly (1899–1970), American economist
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William Edward Moyses Reilly
Major General William Edward Moyses Reilly (13 July 1827 – 28 July 1886), born Scarragh, County Down, on 13 January 1827, was fourth son of James Miles Reilly of Cloon Eavin, Co. Down, by Emilia, second daughter of the Rev Hugh Montgomery of G ...
(1827–1886), British Army general
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William Arthur Reilly (1903–1969), American political figure from Boston
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Bill Reilly (William Francis Reilly, 1938–2008), American publishing and media executive
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Bill Reilly (athlete) (William L. Reilly, born 1943), American steeplechase runner
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Will Reilly (born 2002), American soccer player
* William K. Reilly, pseudonym used by English writer
John Creasey (1908–1973)
{{hndis, Reilly, William