Cecil's Mill Historic District is a national historic district in Great Mills, St. Mary's County, Maryland. It consists of four buildings: Cecil's Mill, Cecil Store, the Cecil Home, and Old Holy Face Church. Cecil's Mill is a 21⁄2-story wood-framed structure, that was used until 1959. Across from the mill is the store, house, and Holy Face Church. The store was constructed in the 1920s and is a good example of a rural store. The Cecil Home was constructed in the late 19th century. Old Holy Face Church is a 21⁄2-story frame church that was abandoned in the 1940s.