Derek Lee Ragin (born June 17, 1958) is an American countertenor.

Ragin studied as a piano major at the Oberlin Conservatory of Music. While at Oberlin he took secondary voice lessons with Richard Anderson. He began his operatic career at Oberlin in Benjamin Britten's A Midsummer Night's Dream as Oberon.After Oberlin, He worked with singer Max van Egmond for a summer session at BPI and went to Europe to pursue his career in Baroque opera.

For the soundtrack of the 1994 film Farinelli, his voice was electronically blended with that of soprano Ewa Malas-Godlewska to recreate the famous castrato's voice.