Douglas Alistair Gordon Pirie was an English long-distance runner. He competed in the 5000 m and 10,000 m events at the 1952, 1956 and 1960 Olympics and won a silver medal in the 5000 m in 1956, placing fourth in 1952. Born in Leeds, Pirie grew up in Coulsdon, Surrey, and ran for the South London Harriers. He died of cholangiocarcinoma in Lymington, Hampshire.

Coulsdon is a town in south London, England, within the London Borough of Croydon. Coulsdon was an ancient parish in the county of Surrey that included the settlements of Purley and Kenley. It was merged with Sanderstead in 1915 to form the Coulsdon and Purley Urban District and has formed part of Greater London since 1965.