Original Fanwear football polo shirt Derby County F.C.

Derby County Football Club is a professional association football club based in Derby, Derbyshire, England, which compete in EFL League One. They have played home matches at Pride Park Stadium since 1997 when they moved from the Baseball Ground after 102 years. The club's home colors have been black and white since the 1890s. The team gets its nickname, The Rams, to show tribute to its links with the First Regiment of Derby Militia, which took a ram as its mascot. Additionally, the club also adopted the song "The Derby Ram" as its regimental song. They have a long-standing rivalry with Nottingham Forest, with whom they contest the East Midlands derby, and both clubs also share a lesser rivalry with nearby Leicester City.

The club was founded in 1884 by William Morley as an offshoot of Derbyshire County Cricket Club. Derby were one of the twelve founder members of the Football League in 1888. They reached three FA Cup finals in their early history – 1898, 1899 and 1903, losing on each occasion. Having been relegated in 1907 after losing one of the sport's great goalscorers in Steve Bloomer, Derby won the Second Division in 1911–12 and again in 1914–15 following another relegation the previous season. They were relegated once more in 1921 and achieved promotion from the Second Division in 1925–26. Derby won the FA Cup in 1946, but suffered two relegations in three years to drop to the third tier for the first time in 1955. Having secured the Third Division North title in 1956–57, they completed their return to the top-flight by winning the Second Division in 1968–69.

Manager Brian Clough led Derby to the First Division title in 1971–72 and the semi-finals of the European Cup in 1973, before Derby were again crowned champions of English football under the stewardship of Dave Mackay in 1974–75. The club, however, again dropped to the third tier following relegations in 1980 and 1984, though promotions in 1985–86 and 1986–87 (as Second Division champions) took them back to the top tier. Relegation followed in 1991, though Derby reached the Premier League for the first time after securing promotion in 1995–96. Relegated in 2002, they won promotion with victory in the 2007 Championship play-off final, though would be relegated after one season. Derby spent 14 consecutive seasons in the Championship until they were relegated in 2022 after nearly a whole season spent in administration.