Thornton is a historic family farm located at Chestertown, Kent County, Maryland, United States. The farm is located on a 352 acre plot on Morgan's Creek, a tributary of the Chester River. The main house is a 2 1/2-story, five-bay brick house, constructed about 1788, and principally Georgian in style. A 1 1/2-story kitchen wing is attached to the west gable end. Also on the property are an early-20th-century dairy barn, a late-19th-century animal barn, a second-half-19th-century granary, a smokehouse, and two sheds. The farm has been owned and operated by the same family for nearly 300 years. Thornton was listed on the National Register of Historic Places in 2005.