The 2011 Leinster Senior Cup, was the 110th staging of the Leinster Senior Cup association football competition. 43 teams entered the 2011 competition including the 11 League of Ireland teams affiliated to the Leinster Football Association who entered the competition at the Fourth round stage. A further 16 Intermediate teams, 14 Junior teams and 2 A Championship sides entered the competition at the First round stage. St.Patrick's Athletic won the competition after beating Bohemians 2-0 at Dalymount Park.