John Grayson may refer to:
- John Grayson (cricketer) (1871–1936), English cricketer
- John B. Grayson (1806–1861), U.S Army lieutenant-colonel in the Mexican–American War, later Confederate brigadier general in the American Civil War
- John Grayson (Heroic Publishing), a fictional superhero better known as Icestar
This disambiguation page lists articles about people with the same name.
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