- Sia LaBelle -- Siamak Guran
- Siamak Jahangiri -- Sianspheric
- Siaosi -- Sibelius
- Sibelius Academy Quartet -- Sibling Harmony
- Sibling Revelry -- Sibylle Berg
- Sibylle Ehlert -- Sic Transit
- SIC Trio -- Sicilia Jazz Big Band
- Sicilian Quartet -- Sick Fits
- Sick Fits -- Sick Rick and the Cancelled Cure
- Sick Rick and the Cancelled Cure -- Sick2Death
- Sickadoe -- Sicko aka Mafioso
- Sicko Soldado -- Sid Ahmed Ould
- Sid Ali -- Sid and Bart