The Leinster GAA Hurling All-Ireland Under-20 Championship known simply as the Leinster Under-20 Championship, is an annual inter-county hurling competition organised by the Leinster Council of the Gaelic Athletic Association (GAA). It is the highest inter-county hurling competition for male players between the ages of 17 and 20 in the province of Leinster. The championship was contested as the Leinster Under-21 Championship between 1964 and 2018 before changing to an under-20 age category from 2019. It is sponsored by Bord Gáis Energy. Galway are the current holders.