- Sienna -- Signals Midwest
- Signan -- Silbermond
- Silbin Sandovar -- Silhouette
- Silhouette -- Silva Y Guerra
- Silva Y Villalba -- Silverbacks
- Silverbeam -- Silvio B.T.
- Silvio BT -- Simon Bakers
- Simon Balsillie -- Simon Hyland
- Simon Isogai -- Simon Standage
- Simon Standage -- Simone The Star
- Simone Torres -- S.I.N.
- Sin 999 -- Sine Nomine Singers
- Sine Projekt -- Single Man Riot
- Single Minded Pros -- Siobhan
- Siobhan Armstrong -- Sir Granville Bantock
- Sir Gregulas Of Danielot -- Sirah
- Siraj -- Siskin
- Siskiyou -- Sister Paul
- Sister Paulina -- Sivuca Dominguinho
- Sivuca Rildo -- Sixth Wind