John Tennyson (born 6 February 1985) is an Irish hurler who played as a centre-back for the Kilkenny senior team.
Born in County Kilkenny, Tennyson first played competitive hurling whilst at school in St.
Kieran's College.
He arrived on the inter-county scene at the age of seventeen when he first linked up with the Kilkenny minor team, before later lining out with the under-21 and intermediate sides.
He made his senior debut during the 2005 championship.
Tennyson went on to play for what has come to be known as the greatest team of all-time, and has won three All-Ireland medals, four Leinster medals and two National Hurling League medals.
He was an All-Ireland runner-up on one occasion.
As a member of the Leinster inter-provincial team on a number of occasions Tennyson won one Railway Cup medal .At club level he continues to play for Carrickshock.
His brother, Pat Tennyson, was also enjoyed an inter-county career with Kilkenny.
Throughout his career Tennyson made 19 championship appearances.
He announced his retirement from inter-county hurling on 26 May 2013.