This is a list of seasons played by Middlesbrough Football Club in English and European football, from 1883, when the club first entered the FA Cup, to the most recent completed season. Middlesbrough Football Club were founded on 18 February 1876, by members of Middlesbrough Cricket Club. For the first years of their existence Middlesbrough participated in competitions such as the Sheffield Cup and the Cleveland Association Challenge Cup. The club have won only one major trophy in their professional history, the Football League Cup in 2004. Most of Middlesbrough's League existence has been in the top two tiers; they were relegated to the Third Division twice in 1966 and 1986, but each time they bounced back as runners-up the following season.
This list details the club's achievements in all competitions, and the top scorers for each season. Records of competitions such as the North Riding Senior Cup are not included due to them being played against lower league opposition and reserve sides.
^The League Cup was founded in the 1960–61 season.
^Includes goals scored in the following competitions: League, FA Cup, League Cup, UEFA Cup, Anglo-Italian Cup, Texaco Cup, Anglo-Scottish Cup, Full Members Cup, except in wartime situations where all active competitions are included.
^ abcdefghijklGoals scored in this season do not contribute to player/club records.
^Second Division leading goalscorer. Includes 59 league goals, a Division Two record. This remains the second-highest number of league goals scored in one season, behind Dixie Dean's 60 league goals a year later.
^Competitive football was abandoned three games into the 1939–40 season and all results were annulled.
^Seven goals were scored in the FA Cup, contributing to records, while 20 goals were scored in the league competition prior to recommencement of the Football League proper the next season.
^Following World War I, in January 1919 the NVL was introduced as a preliminary to the return of the Football League. Results do not contribute to player/club records.
^Wartime competition. Results do not contribute to player/club records.
^Wartime competition. There were two competitions a year from 1941–42 season onwards. Results do not contribute to player/club records.
References
Glasper, Harry (1989). Middlesbrough A Complete Record 1876–1989. Breedon Books Sport. ISBN0-907969-53-4.