Steven A. Ansell (born February 5, 1954), is an American violist whose versatile career involves work as a chamber musician, solo artist, and orchestral musician. Ansell is currently principal violist with the Boston Symphony Orchestra, a position he has held since September 1996. Prior to his appointment, Ansell had already appeared with the orchestra as a guest soloist. Ansell also currently teaches at the Boston University College of Fine Arts and is a member of the Boston Symphony Chamber Players. Ansell is also a founding member of the Muir String Quartet.