| Spoleto Festival | Spoleto Festival | 2005 | 1 | |
| Spring Willow Society | Spring Willow Society | 1914 | 1 | |
| St. Olaf College Speech and Drama Department | St. Olaf College Speech and Drama Department | 1951 | 1 | |
| Stadttheater Basel | Stadttheater Basel | 1928 – 1930 | 2 | |
| Stadttheater Bern | Stadttheater Bern | 1941 – 2016 | 5 | |
| Stadttheater Landsberg (Warthe) | Stadttheater Landsberg (Warthe) | 1928 | 1 | |
| Stadttheater Salzburg | Stadttheater Salzburg | 1911 | 3 | |
| Stage Society | Stage Society | 1900 – 1903 | 5 | |
| Stage West Theatre Company | Stage West Theatre Company | 1996 | 1 | |
| Stagecraft Theatre | Stagecraft Theatre | 2011 | 1 | |
| Stamsund Internasjonale Teaterfestival | Stamsund Internasjonale Teaterfestival | 2012 | 1 | |
| Starlight Theatre Co-operative | Starlight Theatre Co-operative | 2008 | 1 | |
| Statens teaterhøgskole | Statens teaterhøgskole | 1994 – 2003 | 9 | 3 |
| Stavanger Teaters Orkester | Stavanger Teaters Orkester | 1946 | 1 | |
| Stephens College | Stephens College | 1974 | 1 | |
| Stichting Jansen & Jelier | Stichting Jansen & Jelier | 1997 | 1 | |
| Stockholms Kulturfestival | Stockholms Kulturfestival | 2008 – 2011 | 2 | |
| Stolitschna balgarska dramatitscheska trupa «Salsa i smjah» | Stolitschna balgarska dramatitscheska trupa «Salsa i smjah» | 1898 | 2 | |
| Stone & Wings | Stone & Wings | 2006 | 1 | |
| Stordfest | Stordfest | 2007 | 1 | |
| Storsjöyran-festivalen | Storsjöyran-festivalen | 2000 | 1 | |
| STUC | STUC | 1997 | 1 | |
| Studentersamfundets Interne Teater | Studentersamfundets Interne Teater | 1994 – 2006 | 2 | |
| Studentteateret Immaturus | Studentteateret Immaturus | 2006 | 1 | |
| Studentteatret | Studentteatret | 2000 | 1 | |
| Studio of Theatre Arts, The | The Studio of Theatre Arts | 1935 | 1 | |
| Stúdiószínházi Mûhelyek XVI. Fesztiválja | Stúdiószínházi Mûhelyek XVI. Fesztiválja | 2004 | 1 | |
| Städtische Bühnen Düsseldorf | Städtische Bühnen Düsseldorf | 1946 | 1 | |
| Städtische Bühnen Frankfurt am Main | Städtische Bühnen Frankfurt am Main | 1937 | 2 | |
| Städtische Bühnen Freiburg | Städtische Bühnen Freiburg | 1966 | 2 | |
| Städtische Bühnen Hannover | Städtische Bühnen Hannover | 1949 | 1 | |
| Städtische Bühnen Köln | Städtische Bühnen Köln | 1931 – 1932 | 1 | |
| Städtische Schauspiele Baden-Baden | Städtische Schauspiele Baden-Baden | 1919 | 13 | |
| Städtische Theater Leipzig | Städtische Theater Leipzig | 1913 – 1928 | 40 | |
| StøpeSkien | StøpeSkien | 2003 – 2007 | 62 | |
| Staats-Oper Berlin | Staats-Oper Berlin | 1938 | 1 | |
| Staats-Theater Berlin | Staats-Theater Berlin | 1919 – 1930 | 19 | |
| Staatsschauspiel (Ballhof) | Staatsschauspiel (Ballhof) | | | |
| Sudbury Dramatic Society | Sudbury Dramatic Society | 2007 – 2019 | 2 | |
| Sue Lefton Productions | Sue Lefton Productions | 1994 | 1 | |
| Sundrive Players, The | The Sundrive Players | 1965 | 1 | |
| Sunset Players of Sharon | Sunset Players of Sharon | 2003 | 1 | |
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