As of the census of 2000, there were 525 people, 206 households, and 147 families residing in the town. The population density was 529.5 people per square mile (204.8/km²). There were 248 housing units at an average density of 250.1 per square mile (96.7/km²). The racial makeup of the town was 88.00% White, 6.48% African American, 0.95% Native American, 0.19% Asian, 2.86% from other races, and 1.52% from two or more races. Hispanic or Latino of any race were 8.00% of the population.
Thornton is a historic family farm located at Chestertown, Kent County, Maryland, United States. The farm is located on a 352-acre (142ha) plot on Morgan's Creek, a tributary of the Chester River. The main house is a 21⁄2-story, five-bay brick house, constructed about 1788, and principally Georgian in style. A 11⁄2-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.