St Mary's (also known as Limerick Cathedral), is a Cathedral of the Church of Ireland in Limerick City, Ireland which is dedicated to the Blessed Virgin Mary.

It is in the ecclesiastical province of Dublin. Previously the cathedral of the Diocese of Limerick, it is now one of three cathedrals in the United Dioceses of Limerick and Killaloe.

The cathedral is open to the public throughout the week, subject to church services. For more on the history of the Cathedral please visit the website below.