S
- Sacconi Quartet
- Sage String Quartet
- Salomon Quartet
- Schneider Quartet
- Schneiderhan Quartet
- Schörg Quartet
- Section Quartet
- Serenoa String Quartet
- Ševčik-Lhatsky Quartet
- Shanghai String Quartet
- Shaw Strings
- Shostakovich Quartet
- Signum String Quartet
- Silesian String Quartet
- Simon Bolivar Quartet
- SKAZ String Quartet
- Smetana Quartet
- Skampa Quartet
- Smith Quartet
- Solaris Quartet
- Spada Quartet
- Spencer Dyke Quartet
- St. Charles String Quartet
- St. Lawrence Quartet
- St. Petersburg String Quartet
- Stolyarsky String Quartet
- Stradivari Quartet
- Stratton Quartet (original)
- String Poets Quartet
- Strub Quartet
- Stuyvesant Quartet
- Suk Quartet
- Svon Kjellström Quartet
Read more about this topic: List Of String Quartet Ensembles