- Slim Willet & His Hired Hands -- Slobberbone
- Slofunkpump -- Smiley Hobbs
- Smiley Maxedon -- Smith Ballew
- Smith/Fairchild -- Smokey Rogers and His Four Star Rangers
- Smokey Rogers & His Texans -- Smoky Dawson
- Smoky Mountain Band -- Snowbuddy Special
- So You're Bob -- Sol Hoopi's Trio
- Soles of Passion -- Son Light Gospel Singers
- Son Of Roy -- Sonny Burns
- Sonny Curtis -- Sonny LaFave
- Sonny Lee James -- Sonny Salsbury
- Sonny Sims -- Sons of the Desert
- Sons of the Mountaineers -- Sophie Day
- Soulgrass -- Sound Seventy