Leyton Orient F.C. is a club.
The English Football League ( EFL ) is a league competition featuring professional football clubs from England and Wales . Leyton Orient Football Club [ ˌleɪtən_ˈɔəriənt ] is a professional football club in Leyton , London , England . They play in the National League , the fifth tier of the English football league system , following relegation from the Football League in the 2016-17 season . The National League , formerly the Conference National ( currently named the Vanarama National League for sponsorship reasons ) , is the top division of the National League in England . While all of the clubs in the top four tiers of English football are full-time professional , the National League has a mixture of full-time and semi-professional clubs .