The Waterford Junior A Hurling Championship (known for sponsorship reasons as the JJ Kavanagh & Sons Junior Hurling Championship and abbreviated to the Waterford JAHC) is an annual hurling competition organised by the Waterford County Board of the Gaelic Athletic Association since 1924 and contested by the divisional junior champions in the county of Waterford in Ireland.

It is the fourth tier overall in the entire Waterford hurling championship system.

The winner gains automatic promotion to the Waterford Intermediate Championship the following season.

Lismore are the most successful teams in the tournament's history, having won it seven times each.

From its inception in 2002, the Waterford JAHC champions automatically qualify for the Munster Club JHC.