Graham Christopher Stack (born 26 September 1981) is a professional football former player and coach, who is currently the head of academy goalkeeping at Watford.
Stack played as a goalkeeper for Arsenal, Beveren, Millwall, Reading, Leeds United, Wolverhampton Wanderers, Plymouth Argyle, Blackpool, Hibernian, Barnet, Kerala Blasters and Eastleigh.
He also played in under-21 internationals for the Republic of Ireland.