Gary Allen (disambiguation)

Gary Allen (1936–1986) was an American conservative writer.

Gary Allen may also refer to:

• Gary Allen (gridiron football) (1960–2023), American football player
• Gary Allen (runner) (born 1957), American long-distance runner,
• Gary Allen (cricketer) (1945–2022), New Zealand cricketer
• Gary Arthur Allen (born 1973), British convicted murderer, see Gary Allen case