Robert Barclay Allardice of Ury (25 August 1779, Stonehaven, Kincardineshire – 1 May 1854), generally known as Captain Barclay, was a notable Scottish walker of the early 19th century, known as the celebrated pedestrian. His most famous feat was walking 1000 miles in 1000 hours for 1000 guineas in 1809. He is considered the father of the 19th-century sport of pedestrianism, a precursor to racewalking.
He should not be confused with his father, who had assumed the name Robert Barclay Allardice and undertook the first redevelopment of the town of Stonehaven.