Diarmuid Horan (born 1988) is an Irish hurler who played as a left wing-back for the Offaly senior hurling team.
Horan made his first appearance for the team during the 200 National League and was a regular member of the starting fifteen until he left the panel prior to the 2009 championship. During that time he experienced little success. Horan returned to inter-county hurling with Offaly in 2012.
At club level Horan plays with the St Rynagh's club.
Horan's father, Pádraig, and his brother Cathal, also played hurling with Offaly.