John Gilman may refer to:
- John Gilman (activist) (1920–2011), American activist
- John J. Gilman (1925–2009), American material scientist
- John M. Gilman (1824–1906), American politician and lawyer
- John Taylor Gilman (1753–1828), American farmer, shipbuilder and politician
- John Gillman – civilian name of Homelander, a fictional character from The Boys
- Jonathan Gillman (born 1935), Australian sharp shooter
This disambiguation page lists articles about people with the same name.
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