Middlesbrough Football Club (/ˈmɪdəlzbrə/) is a professional association football club based in Middlesbrough, North Yorkshire, England. Formed in 1876, they have played at the Riverside Stadium since 1995, their second ground since turning professional in 1889. They played at Ayresome Park for 92 years, from 1903 to 1995.
They were one of the founding members of the Premier League in 1992. The club's main rivals are Sunderland and Newcastle United. There is also a rivalry with fellow Yorkshire club Leeds United.
The club's highest league finish to date was third in the 1913–14 season and they have only spent two seasons outside of the Football League's top two divisions. The club came close to folding in 1986 after experiencing severe financial difficulties before it was saved by a consortium led by then board member and later chairman Steve Gibson. Middlesbrough were deducted three points for failing to fulfil a fixture against Blackburn Rovers in the 1996–97 Premier League season and subsequently relegated.They were promoted the following season and spent 11 seasons in the top division before being relegated again in 2009.
Middlesbrough won the League Cup in 2004, the club's first and only major trophy. They reached the 2006 UEFA Cup Final, but were beaten by Spanish side Sevilla. After seven years in the Championship, Middlesbrough secured promotion to the Premier League in 2016 after finishing in second place.
The club's traditional kit is red with white detailing. The various crests throughout the club's history, the most recent of which was adopted in 2007,incorporate a lion rampant.