Billy Drennan (born April 2003) is an Irish hurler.
Drennan first played hurling at juvenile and underage levels with the Galmoy club, while also playing as a schoolboy with CBS Kilkenny in the Leinster Colleges' Championship.
[3] Drennan first appeared on the inter-county scene as a member of the Kilkenny minor hurling team that lost the 2019 All-Ireland minor final to Galway.
[5] He immediately progressed to the under-20 team and was man of the match when Kilkenny beat Limerick in the 2022 All-Ireland under-20 final.
[6] Drennan first played for the senior team during the 2023 Walsh Cup.