St Mary's Church in the Market Place of Wilton, Wiltshire, England, was built in the 15th century. It is recorded in the National Heritage List for England as a designated Grade II* listed building, and is now a redundant church in the care of the Churches Conservation Trust. As a result, the old church was partially demolished, apart from the chancel and one bay of the nave. The ruins consist of the three arches of the south arcade, fragments of the north arcade and the altered eastern arch of the west tower or west window within the churchyard.