Has Derby County ever finished in the top four of the Premier League?

No, Derby County has never finished in the top four of the Premier League. The club was promoted to the Premier League in 2007 and in 2008 they finished a best-ever sixth place. However, since then they have been relegated twice and have not been able to gain promotion back to the Premier League. Derby County have been unable to break into the top four of the Premier League, and their best-ever finish was sixth place in 2008.

The club was relegated in 2008–09, and returned to the Championship after just one season in the Premier League. They have not been able to replicate their form of 2008 and have not been able to gain promotion back to the top-flight. The club has come close to the top four on several occasions, but have never been able to break into the top four.

In the 2017-18 season, the club finished sixth in the Championship, missing out on the play-offs by just two points. The club has been unable to gain promotion to the Premier League and has not been able to get close to the top four of the Premier League. Despite their best efforts, Derby County has never been able to finish in the top four of the Premier League.