The school is named in honour of Saint Cronan, whose feast day falls on 28 April.

The school has a Catholic ethos and prepares its students for the sacraments of Confirmation and Holy Communion.

St. Cronan's has both Gaelic football and hurling teams which compete against other schools in the Wicklow area.

In December 2004, the choir released an album entitled The Magic of Christmas, which included a guest appearance by the late Ronnie Drew of The Dubliners.

The St. Cronan's choir, along with some musicians from the senior classes in the school performed for the ambassador and his diplomatic entourage.

[citation needed] St. Cronan's is linked with Edgewood Elementary School in the U.S. state of Minnesota.