Culum Retallick (born 8 May 1985 in Rangiora, New Zealand) is a professional rugby union player who plays for the Blues in Super Rugby and represents Bay of Plenty in the ITM Cup.
Retallick came up through the Canterbury system but, unable to crack a deep ITM Cup squad, moved north to sign with Bay of Plenty for the 2007 Air New Zealand Cup. He made 7 starts in his debut season and by 2008 was a fixture in the starting lineup.
He made his 50th appearance for the side in a victory over Counties Manukau during the opening round of the 2011 ITM Cup on 17 July 2011.