St Marys is named after the parish church St Marys Magdalene, built between 1837 and 1840 and situated between the Great Western Highway and King Street.  The church foundation stone was laid on the 22nd November 1837 by Bishop Broughton.  The church is one of the oldest churches in NSW that is still providing regular services.   The church is heritage-listed and internees in the church cemetery include the wife of Philip Gidley King, Governor of NSW plus other members of the King family.