The 2012–13 Leinster Senior Cup, was the 112th staging of the Leinster Senior Cup association football competition.

39 teams entered the 2012–13 competition including the 11 Leinster based League of Ireland teams who entered the competition at the Fourth round stage. A further 15 Intermediate teams and 13 Junior teams entered the competition at the First and Second Round stage.

Shamrock Rovers are the defending champions.

The teams taking part in the 2013 Leinster Senior Cup are:

10 Intermediate clubs and 6 Junior clubs were entered into this round by a draw. Byes were given to 12 other clubs. Winners progress to the Second Round.

Byes:

10 Intermediate clubs and 10 Junior clubs were placed in the draw for the Second Round. The winners of these 10 matches will proceed to the Third Round.

5 Intermediate clubs and 5 Junior clubs made it to the draw for the Third Round. The 5 winners will go on to the Fourth Round.