St Mary’s is a Catholic School under the trusteeship of the Archdiocese of Liverpool. It is maintained by Wigan Council. As a Voluntary Aided School, the Governing Body is the Admissions Authority and is responsible for taking decisions on applications for admissions. The co-ordination of admissions arrangements is undertaken by the Local Authority. For the school’s year commencing September 2023, the Governing Body has set its admissions number at 260.