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.
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.
The 3 Intermediate teams and the 2 Junior teams that won their Third Round matches were placed in the draw for the Fourth Round along with the 11 Leinster based Senior League of Ireland teams.
The draw for the quarter-finals was made on 24 April 2013 in Abbotstown, Dublin.