Billy Hennessy (born 15 August 1997) is an Irish hurler who plays as a left wing-back for club side St Finbarr's and at senior level with the Cork county team.
[2] Hennessy joined the St Finbarr's club at a young age and played in all grades at juvenile and underage levels as a dual player of hurling and Gaelic football.
On 28 September 2015, Hennessy was at full-back when the St Finbarr's minor football team defeated Douglas by 1-09 to 0-08 in the final to win a fifth Premier 1 MFC title in nine years.
[5] Hennessy won a Munster Championship medal on 4 July 2018 when he lined out at right wing-back in Cork's 2-23 to 1-13 defeat of Tipperary in the final.
[8] Hennessy made his first appearance for the Cork senior hurling team in the pre-season Canon O'Brien Cup on 6 January 2017.