Derrick Dewayne Allen (born July 17, 1980) is an American professional basketball coach and former player.

[3] Allen saw action in 60 games with the Ole Miss Rebels between 2001 and 2003, averaging 8.6 points and 5.4 rebounds per contest.

He was a key player in Keflavík's double-winning campaign (national championship and cup competition), turning in averages of 23.4 points and 10.5 rebounds in league play.

[6] In the following years, Allen made his mark in the German Basketball Bundesliga, playing for BG Karlsruhe, Bayer Giants Leverkusen, the Skyliners Frankfurt and Alba Berlin.

After spending the 2012–13 season with Belgian powerhouse Spirou BC Charleroi,[10] Allen returned to Germany, enjoying stints with Eisbären Bremerhaven, Basketball Löwen Braunschweig and SC Rasta Vechta.