The Leinster Schools McMullen Cup is the third rugby union competition for secondary schools established as rugby playing school with the Leinster Branch of the IRFU.
Senior Schools Cup Rugby is divided into 4 tiers in two sections and each cup competition bears a name as follows: Section A Leinster Schools Rugby Senior Development Cup (effectively division 4), Section A Leinster Schools Rugby McMullen Cup (effectively division 3), Section B Leinster Schools Vinnie Murray Cup (effectively division 2), Section B Leinster Schools Rugby Senior Cup Challenge Cup (effectively division 1).
¬Holy Faith De La Salle Skerries is now known as 'Skerries Community College'