St Mary's Church is in the Deanery of Trowbridge, which extents from Chippenham to Warminster and Corsham to Calne. The Dean of Trowbridge is the Very Rev Desmond Millett.
The Deanery is inthe Diocese of Clifton,which is led by Rt Rev Declan Lang, the Ninth Bishop of Clifton, and centred upon the Cathedral Church of St Peter and St Paul, Clifton.
The Diocese covers the Counties of Gloucestershire, Somerset, Wiltshire, South Gloucestershire, North Somerset, Bath and North East Somerset, and the City and County of Bristol, and is inthe Archdiocese of Birmingham,led by Most Rev Vincent Nichols.
The Catholic Church publishes a weekly newspaper,The Catholic Herald,and a second newspaper,The Tabletis also dedicated to Catholic affairs,and has an excellent web site.