John Heffernan may refer to:
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John Heffernan (American actor) (1934–2018), American actor
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John Heffernan (British actor)
John Heffernan (born 30 June 1981) is a British actor. He has worked with the English Touring Theatre, the Royal Shakespeare Company (RSC), and the National Theatre, taking the lead roles in ''Edward II'' at the National Theatre, and ''Oppenhe ...
(born 1981), British actor
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John Heffernan (hurler) (born 1963), Irish hurler
* John Heffernan, co-writer of ''
Snakes on a Plane''
{{hndis, Heffernan, John