St Mary's Church is the Grade I listed Anglican parish church of West Chiltington, a village in the Horsham district of West Sussex, England. The 12th-century building, described as a "showpiece" and "the most attractive part" of the Wealden village, retains many features of historical and architectural interest. These include an exceptionally long hagioscope or squint from the south aisle into the chancel, a porch which may be Sussex's oldest, and a well preserved and extensive scheme of wall paintings. In the Sussex volume of The Buildings of England, Ian Nairn says that the appearance of the church gives "a very happy, unexpected effect, like a French village church".