- Sandy Randall -- Santiago Jimenez, Jr.
- Sara and Maybelle Carter -- Sara Softich
- Sara Storer -- Sarah Choi
- Sarah Cram -- Sarah MacDougall
- Sarah McCully -- Sarah Wilson
- Sarah Wynn -- Sawtooth
- Sawtooth Bluegrass Band -- Schneider Sisters
- Schoonin' -- Scott B. Bomar
- Scott Boatright -- Scott Dorman & The Big Lonesome
- Scott Dukeman -- Scott Greene
- Scott Greenwalt -- Scott Joss
- Scott Lewis -- Scott McIlwain & Dale Crockett