Leyton Orient Football Club, commonly referred to as Orient, is a professional association football club based in Leyton, Waltham Forest, London, England. The team compete in EFL League One, the third level of the English football league system.
Founded in 1881 as the Glyn Cricket Club, they began playing football as Orient in 1888 and joined the London League in 1896 after success in the Clapton & District League. The club adopted the name Clapton Orient two years later and were elected into the Football League in 1905. Relegated out of the Second Division in 1929, the club adopted the name Leyton Orient after World War II. They won the Third Division South title in 1955–56 and secured promotion out of the Second Division in 1961–62, though were relegated out of the First Division after just one season, and suffered a further relegation in 1966. That summer the club's name changed to Orient F.C. and they went on to win the Third Division under the stewardship of Jimmy Bloomfield in 1969–70. Orient spent the 1970s playing in the second tier, winning two London Challenge Cups and reaching the 1977 Anglo-Scottish Cup final and 1977–78 FA Cup semi-finals, before being relegated in 1982 and again in 1985.