Stuart Duncan (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 is married with three children.
Duncan has been a member of the Nashville Bluegrass Band since 1985. He also works as a session musician and has played with numerous well known performers including George Strait, Dolly Parton, Reba McEntire and Barbra Streisand. In 2006, he toured with the Mark Knopfler–Emmylou Harris Roadrunning tour, and he appears on their All the Roadrunning and Real Live Roadrunning albums. In 2008, he joined Robert Plant and Alison Krauss on the tour for their critically acclaimed album Raising Sand. He appeared on Transatlantic Sessions Series 4 broadcast by the BBC in September/October 2009. In 2011, Duncan collaborated with cellist Yo-Yo Ma, bassist Edgar Meyer, and mandolinist Chris Thile on the album The Goat Rodeo Sessions. In 2013, Duncan accompanied Diana Krall as a sideman on her Glad Rag Doll tour.