Garry Hanniffy (born 4 April 1977) is an Irish hurler who played as a centre-forward for the Offaly senior hurling team.
Hanniffy made his first appearance for the team during the 1997 National League and subsequently became a regular member of the starting fifteen until his retirement prior to the 2008 championship. During that time he won one All-Ireland medal and one National Hurling League (Division 2) medal. Hanniffy was an All-Ireland runner-up on one occasion.
At club level Hanniffy is a three-time All-Ireland medalist with Birr. In addition to this he has also won five Leinster medals and ten county club championship medals.
Hanniffy's father, Declan, and his brothers, Darren and Rory, also played hurling with Offaly.