Stuart Ian Duncan[1] (born April 14, 1964) is an American bluegrass musician who plays the fiddle, mandolin, guitar, and banjo.

Duncan was born in Quantico, Virginia, and raised in Santa Paula, California, where he played in the school band.

He also works as a session musician and has played with numerous well-known performers, including George Strait, Dolly Parton, Guy Clark, Reba McEntire, and Barbra Streisand.

In 2011, Duncan collaborated with cellist Yo-Yo Ma, bassist Edgar Meyer, mandolinist Chris Thile, and singer Aoife O'Donovan on the album The Goat Rodeo Sessions.

[6] Duncan played fiddle on the mid-2021 Bob Dylan recordings of "Blowin' in the Wind," "Masters of War," "The Times They Are A-Changin' (song)," "Simple Twist of Fate," "Gotta Serve Somebody," and "Not Dark Yet" produced by T-Bone Burnett and recorded and mixed by Michael Piersante for a one-time sale as Ionic Originals.