Manchester United Football Club is a professional football club based in Old Trafford, Greater Manchester, England, that competes in the Premier League, the top flight of English football.

Nicknamed "the Red Devils", the club was founded as Newton Heath LYR Football Club in 1878, changed its name to Manchester United in 1902 and moved to its current stadium, Old Trafford, in 1910.

Manchester United have won the most trophies in English club football, including a record 20 League titles, 12 FA Cups, five League Cups and a record 21 FA Community Shields.

They have won three European Cups/UEFA Champions Leagues, one UEFA Europa League, one UEFA Cup Winners' Cup, one UEFA Super Cup, one Intercontinental Cup and one FIFA Club World Cup. In 1998–99, the club became the first in the history of English football to achieve the continental European treble,[7] and are one of five clubs to have won all main UEFA club competitions after winning the UEFA Europa League in 2016–17.

The 1958 Munich air disaster claimed the lives of eight players. In 1968, under the management of Matt Busby, Manchester United became the first English club to win the European Cup.

Alex Ferguson is the club's longest serving and most successful manager, winning 38 trophies, including 13 league titles, 5 FA Cups and 2 UEFA Champions Leagues, between 1986 and 2013.

Manchester United is one of the most widely supported football clubs in the world, and has rivalries with Liverpool, Manchester City, Arsenal and Leeds United.