Brentford Football Club is a professional football club based in Brentford, West London, England. They compete in the Premier League, the highest tier of English football, having gained promotion via the playoffs at the end of the 2020–21 Championship season. Nicknamed "The Bees", the club was founded in 1889 and played home matches at Griffin Park from 1904 before moving to Gtech Community Stadium in 2020. Their main rivals are fellow West London-based clubs Fulham and Queens Park Rangers.

Brentford initially played amateur football before they entered the London League in 1896 and finished as runners-up of the Second Division and then the First Division to win election into the Southern League in 1898. They won the Southern League Second Division in 1900–01 and were elected into the Football League in 1920. Brentford won the Third Division South title in 1932–33 and the Second Division title in 1934–35. The club enjoyed a successful spell in the top flight of English football, reaching a peak of fifth in the First Division, in 1935–36, their highest ever league finish, before three relegations left them in the Fourth Division by 1962. They were crowned Fourth Division champions in 1962–63, but were relegated in 1966 and again in 1973 after gaining promotion in 1971–72. Brentford spent 14 seasons in the Third Division after gaining promotion in 1977–78 and went on to win the Third Division title in 1991–92, though were relegated again in 1993.