McIlwain is a surname. Notable people with the surname include:
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Alfie McIlwain
The Order of the Phoenix is a secret organisation in the ''Harry Potter'' series of fiction books written by J. K. Rowling. Founded by Albus Dumbledore to fight Lord Voldemort and his followers, the Death Eaters, the Order lends its name to ...
(born 1998), English actor
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Charles Howard McIlwain
Charles Howard McIlwain (March 15, 1871 – June 1, 1968) was an American historian and political scientist. He won the Pulitzer Prize for History in 1924. He was educated at Princeton University and Harvard University and taught at both instituti ...
(1871–1968), American historian and political scientist
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Dallas McIlwain (born 1982), Australian rugby league player
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David McIlwain (1921–1981), English science fiction writer
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Douglas McIlwain (born 1968), English local politician Mayor of Huntingdon
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James McIlwain, American ophthalmologist
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Stover McIlwain (1939–1966), American baseball player
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Wally McIlwain
Wallace Wesley McIlwain (January 20, 1903 – June 30, 1963) was an American football player and coach. He played professionally in the National Football League (NFL) for the Racine Tornadoes. In 1926, he was a player-coach for the Tornadoes. ...
(1903–1963), American football player
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Zach McIlwain (born 1986), American national veterans advocate
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