Marion duPont Scott was a thoroughbred horsebreeder who operated a racing stable for both flat and steeplechase racing. She was the last private owner of Montpelier, the mansion and land estate of former United States President James Madison.

James Madison's Montpelier, located in Orange County, Virginia, was the plantation house of the Madison family, including Founding Father and fourth president of the United States James Madison and his wife, Dolley. The 2,650-acre (1,070 ha) property is open seven days a week.