Middlesbrough Football Club, also known as Boro, are an English football club based in Middlesbrough, who play in the Football League Championship. Formed in 1876, they have played at the Riverside Stadium since August 1995, their third ground since turning professional in 1889. Their longest-serving home was Ayresome Park, where they played 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. The club also take part in Yorkshire derbies with several other Yorkshire clubs, most notably Leeds United.