Glenstal Abbey School is an all boys independent day and boarding Catholic secondary school, located on the grounds of Glenstal Abbey in Murroe, County Limerick, Ireland. It is run by monks of the Benedictine order. The school offers seven-day full boarding, as well as day boarding (Mon-Sat). The school is regularly ranked among the top schools in Ireland.

Glenstal Abbey is a Catholic Benedictine monastery of the Congregation of the Annunciation located in Murroe, County Limerick, Ireland. It is dedicated to Saint Joseph and Saint Columba. As of 2018, the abbot of the monastery was Brendan Coffey.