The Munster Schools Junior Cup or Munster Junior Cup is the under-age rugby union competition for schools affiliated to the Munster Branch of the IRFU with team members under 16 years of age.
The competition has been traditionally dominated by Cork city's major rugby playing schools C.B.C. (16 titles) & P.B.C. (29). The County Tipperary school Rockwell College has won 19 titles with Limerick schools, largely due to contributions from Crescent College¹ (6) & St. Munchin's (5), winning in all 16 titles.
¹ Although the school has always been referred to as Crescent College, its official name was Sacred Heart College SJ up until the 1970s, when it became a comprehensive school. Since then its official name has been Crescent College Comprehensive SJ.