Sara Caswell (born February 21, 1978) is an American violinist who has worked with 9 Horses, Esperanza Spalding,[1] and David Krakauer.

Born into a musical family in Bloomington, Indiana,[2] Caswell studied classical violin with Josef Gingold, but from an early age she became interested in jazz and learned from Indiana University professor David Baker,[3] violinist John Blake Jr.,[4] and trumpeter Patrick Harbison.

She formed a jazz quartet with guitarist Jesse Lewis, bassist Ike Sturm, and drummer Jared Schonig.

In 2010, Caswell began performing with Esperanza Spalding's Chamber Music Society, an ensemble featuring rhythm section and string trio, and was on tour promoting the Chamber Music Society recording when Spalding won the Grammy Award for Best New Artist.

Their debut album Perfectest Herald and follow-up EP Blood From A Stone were released on Sunnyside Records.