Casey Christopher Driessen (born December 6, 1978 Owatonna, Minnesota, United States) is an American bluegrass fiddler and singer. He plays acoustic and electric five-string violins, each of which has an additional low C string.
He has performed with Béla Fleck, Abigail Washburn, Steve Earle, Tim O'Brien, Darrell Scott, Jim Lauderdale, Lee Ann Womack, Mark Schatz, John Doyle, and Chris Thile. He has recorded with Darol Anger, John Mayer, Jerry Douglas, Jamey Haddad, and Blue Merle. He has also recorded on the soundtrack for the Johnny Cash film Walk the Line. He has toured with The Duhks, replacing Tania Elizabeth.
In November 2006 Driessen toured China and Tibet with the Sparrow Quartet (which also includes Béla Fleck, Abigail Washburn, and cellist Ben Sollee). He also has his own band, the Colorfools, which includes Matt Mangano on bass and Tom "Tommy G" Giampietro on drums.
His first solo recording, 3D, was released in May 2006 on Sugar Hill Records. In 2007, the track Jerusalem Ridge received a Grammy Award nomination for Best Country Instrumental Performance. With fiddler Darol Anger and Rushad Eggleston, he has released an instructional DVD entitled Chops & Grooves: Rhythmic Explorations for Bowed Instruments.
He contributed to Crooked Still's CD Shaken By A Low Sound (2006), and Taarka's The Martian Picture Soundtrack. Most recently, he released his second solo recording, "Oog" (2009) on Red Shoes Records.
He has attended the Mark O'Connor fiddle camp as a teacher.