Woodburn Stud was an American horse breeding farm located in Woodford County, Kentucky about ten miles (16 km) from the city of Lexington. It was established in the 18th century as an original land grant property of General Hugh Mercer to whom it had been granted for his military services during the American Revolutionary War. Robert Alexander (1767–1841), a Scottish immigrant, came to Virginia from Scotland in 1786. Around 1790 he purchased the Mercer estate in Kentucky. Under the guidance of his son, Robert A. Alexander, during the 19th century, Woodburn Stud became the birthplace of Kentucky's Thoroughbred industry.