Alex Richard Cusack (born 29 October 1980) is a former Irish cricketer.
A club cricketer for Clontarf, Cusack was a carpenter by trade until he was granted a professional contract with the Irish Cricket Union in 2009.
He is a middle-order right-handed batsman and bowls right-arm medium-fast.
Cusack made his international debut in 2007.
In 2009 Cusack became one of the first two players to be given contracts with Cricket Ireland.
A year later, the number of cricketers with contracts with CI had increased to six, with Cusack still amongst their number.
In 2011 Cricket World Cup match against England, Cusack joined with century maker Kevin O'Brien helped for where Irish gained famous win against England.
In that World Cup match against England he along with Kevin O'Brien set the highest ever 6th wicket partnership in World Cup history (162)In August 2015 Cusack announced his retirement from cricket.