Martin O'Neill (disambiguation)

Martin O'Neill (born 1952) is a retired footballer and current football manager.

Martin O'Neill may also refer to:
 * Martin O'Neill, Baron O'Neill of Clackmannan (1945–2020), Scottish politician
 * Martin O'Neill (footballer, born 1975), Scottish footballer
 * Martin O'Neill (hurler) (born 1992), Irish hurler