Built in the mid-50s, St Mary's became a parish church in 1972 and serves the Marshalswick community. It has an active children's church, weekly services, youth clubs, a lunch club for the elderly and monthly meetings of its prayer group, healing ministry, women's fellowship and mothers' union. The church choir welcomes new members.
St Mary's Toddler Group meets every Tuesday at 9.45am and gives families an opportunity to enjoy informal learning and play.