This is a list of all seasons played by Chelsea Football Club in English and European football, from their inaugural season in 1905–06 to their last completed season (2023–24). It details their record in every major competition entered, as well as the top goalscorers for each season. Top scorers in bold were also the top scorers in Chelsea's division that season.
^Chelsea ended the 1914–15 season in a relegation position, but when the league was expanded after the First World War the club was invited to rejoin the First Division.
^As English champions, Chelsea qualified for the inaugural European Champions' Cup, but withdrew under pressure from the Football League, whose chairman Alan Hardaker felt priority should be given to domestic competitions.
^33 goals in the First Division.
^41 goals in the First Division.
^ a b cIn the early years of the League Cup, some clubs opted not to participate. Chelsea withdrew from the competition in 1961–62, 1962–63 and 1965–66.
^35 goals in the Second Division.
^28 goals in the Second Division.
^24 goals in the First Division; joint top scorer alongside Gary Lineker (Leicester City).
^Chelsea were relegated after losing a two-legged play-off against Middlesbrough.
^23 goals in the Premier League.
^20 goals in the Premier League.
^19 goals in the Premier League.
^29 goals in the Premier League.
References
Glanvill, Rick (2005). Chelsea FC: The Official Biography - The Definitive Story of the First 100 Years. Headline Book Publishing Ltd. ISBN 0-7553-1465-4.
Hockings, Ron. 100 Years of The Blues - A Statistical History of Chelsea FC 1905–2006.