Original Umbro hooded training jacket Nottingham Forest 2004/06

Nottingham Forest Football Club is an association football club based in West Bridgford, Nottinghamshire, England. The football club was founded in 1865, and have played their home games at the City Ground, on the banks of the River Trent, since 1898. Forest are one of four English clubs to have won the European Cup (UEFA Champions League) more than once, and are one of two English clubs to have won the European Cup back-to-back. The club competes in the Premier League, the top division of the English football league system.

Nottingham Forest have won two European Cups, one UEFA Super Cup, one League title, two FA Cups, four League Cups, and one FA Charity Shield. The club has competed in the top two tiers of English football since its admission to the Football League, with the exception of five seasons in the third tier. Its most successful period was under the management of Brian Clough and Peter Taylor in the late 1970s and early 1980s, which included back-to-back wins in the European Cup in 1979 and 1980.

In Clough's last decade at the club, the Nottingham Forest team won the 1989 and 1990 League Cups and were losing finalists in the 1991 FA Cup Final, before relegation from the Premier League in 1993. Upon an immediate return Forest finished third in the Premier League in 1995, before the club suffered relegations from the top flight again in 1997 and 1999. The team returned to the Premier League by winning the 2022 Championship play-off final against Huddersfield Town.

The club's fiercest rivalry is with Derby County, with which it contests the East Midlands derby and competes for the Brian Clough Trophy. Forest also contests the Nottingham derby with city rivals Notts County; however, as County has generally played in lower leagues than its neighbours, fixtures between the two clubs have been rare in recent history. There is also a notable rivalry with Leicester City.