St Mary's Church is an Anglican church in the village of Slaugham in Mid Sussex, one of seven local government districts in the English county of West Sussex. The 12th- and 13th-century church, restored in the Victorian era, serves a large rural area of the Sussex Weald, covering three villages (each with current or former chapels of ease of their own) as well as the ancient settlement of Slaugham. It also controlled the church in the market town of Crawley—now one of the area's largest towns—for the first few centuries of its existence. A locally important family built a private chapel in the church in the 17th century, and a series of memorials to deceased family members are considered to be excellent examples of their type.