Leinster Senior League (rugby union)

The Leinster Senior League, inaugurated in 1971-72, is a rugby union competition for senior clubs in the Irish province of Leinster. It has traditionally been ranked second in importance to the Leinster Senior Cup. It declined in importance due to the formation of the All-Ireland League and growth in importance of the Heineken Cup and was eventually merged with the Senior Cup, sometime before 2006, before being revived in 2016.

The clubs are split into two divisions, and further subdivided into groups. The eight highest-placed teams in the previous season's All-Ireland League participate in Division 1 and are split into two groups of four, who play each other once. The group winners contest the final for the league championship. The remaining senior teams play in Division 2, divided into three groups, the winners of which qualify for the Division 2 play-offs, and ultimately the Division 2 final.

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