Has Derby County ever been relegated from the Premier League?

Yes, Derby County has been relegated from the Premier League. The club has been relegated twice, in 2002–03 and 2007–08. In 2002–03, Derby County finished in 19th place in the Premier League, with just 11 wins in 38 games. This resulted in their relegation to the Football League Championship. In 2007–08, the club finished in 20th place with just six wins in 38 games. This resulted in their second relegation from the Premier League.

The club has also experienced a number of near-misses, narrowly avoiding relegation in 2003–04 (finishing 17th), 2004–05 (finishing 14th) and 2006–07 (finishing 17th). In the 2006–07 season, Derby County had the lowest points total of any Premier League club in history (just 11 points).

Despite this, Derby County have also enjoyed some success in the Premier League. In 2007, they finished in 6th place, their highest ever finish in the Premier League. They also qualified for the UEFA Cup in the same season. Despite their relegation, the club has remained in the top two tiers of English football since their promotion to the Premier League in 1996.