Gregory Martin or Greg Martin may refer to:
Gregory Martin (politician), Canadian,
Gregory Martin (scholar) (c. 1542-1582), Bible translator,
Gregory J. Martin, American medical doctor and U.S. Navy captain,
Gregory S. Martin (born 1948), USAF general,
Gregory Paul Martin (born 1962), actor,
Greg Martin (rugby player) (born 1963), Australian rugby union player,
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