St Mary's Church is the civic church of Bury St Edmunds in Suffolk, England and is one of the largest parish churches in England. It claims to have the second longest nave, and the largest West Window of any parish church in the country. It was part of the abbey complex and originally was one of three large churches in the town.

Bury St Edmunds, commonly referred to locally as Bury, is a historic market and cathedral town and civil parish in the West Suffolk district, in the county of Suffolk, England. The town is best known for Bury St Edmunds Abbey and St Edmundsbury Cathedral. Bury is the seat of the Diocese of St Edmundsbury and Ipswich of the Church of England, with the episcopal see at St Edmundsbury Cathedral. In 2011 it had a population of 45,000.