| Compagnia Alfredo Campioni | Compagnia Alfredo Campioni | 1892 | 3 | |
| Compagnia Alessandro Marchetti | Compagnia Alessandro Marchetti | 1893 | 1 | |
| Compagnia Adolfo Colonnello | Compagnia Adolfo Colonnello | 1893 | 2 | |
| Commonwealth Savings/Trading Bank of Australia, The | The Commonwealth Savings/Trading Bank of Australia | 1976 | 1 | |
| Commonweal Theatre Company | Commonweal Theatre Company | 1998 – 2017 | 48 | |
| Comédie de Rennes, La | La Comédie de Rennes | 1982 | 1 | |
| Comédie de Lyon | Comédie de Lyon | 1980 | 1 | |
| Comedia Nacional | Comedia Nacional | 1954 – 2019 | 6 | |
| Collectif Io | Collectif Io | 2023 | 1 | |
| Coal Mine Theatre | Coal Mine Theatre | 2024 | 1 | |
| Cleveland Play House | Cleveland Play House | 1929 – 1971 | 8 | |
| Clarion Dramatic Club | Clarion Dramatic Club | 1916 | 1 | |
| Civica Scuola di Teatro Paolo Grassi | Civica Scuola di Teatro Paolo Grassi | 2018 | 4 | 2 |
| Cidade de São Paulo Cultura | Cidade de São Paulo Cultura (São Paulo Municipal Department of Culture) | 2024 | 3 | |
| Cía. Dramática Italiana Teresa Mariani | Cía. Dramática Italiana Teresa Mariani | 1904 | 1 | |
| Cía. Dramática Italiana Ruggeri-Borelli | Cía. Dramática Italiana Ruggeri-Borelli | 1909 | 1 | |
| Cía. Dramática Italiana de Andrea Maggi | Cía. Dramática Italiana de Andrea Maggi | 1896 | 1 | |
| Cía. Dramática Española Miguel Muñoz | Cía. Dramática Española Miguel Muñoz | | | |
| Cía. Cómico Dramática Mercedes Navarro y Julio Taboada | Cía. Cómico Dramática Mercedes Navarro y Julio Taboada | 1916 | 1 | |
| Chronic'Théâtre | Chronic'Théâtre | 2007 | 1 | |
| Christliche Landesbühne Mittelrhein | Christliche Landesbühne Mittelrhein | 1961 | 1 | |
| Christiania Folketheater | Christiania Folketheater | 1880 | 2 | |
| Christian Wilhelm Foght Teaterselskab | Wilhelm Foght Teaterselskab (Christian Wilhelm Foght Teaterselskab) | 1878 – 1880 | 12 | |
| Chr. W. Foghts Teaterselskab | Chr. W. Foghts Teaterselskab | | | |
| Chosun Actors School | Chosun Actors School | 1925 | 1 | |
| Chongqing Drama Society | Chongqing Drama Society | 1941 | 2 | |
| Chiswick Drama Circle | Chiswick Drama Circle | 1956 | 1 | |
| China University of Mining and Technology | China University of Mining and Technology | 2010 | 1 | |
| China National Experimental Theatre (CNET) | China National Experimental Theatre (CNET) | 1998 – 2006 | 3 | |
| Chicago Conservatory of Music and Dramatic Art | Chicago Conservatory of Music and Dramatic Art | 1895 | 1 | |
| Chiaroscuro Productions | Chiaroscuro Productions | 2002 | 1 | |
| Chester Theatre Group | Chester Theatre Group | 2002 | 1 | |
| Chesapeake Shakespeare Company | Chesapeake Shakespeare Company | 2008 | 1 | |
| Chemnitzer Volksbühne | Chemnitzer Volksbühne | 1930 | 1 | |
| Chemainus Theatre Festival | Chemainus Theatre Festival | 2007 | 1 | |
| Charter Chroniclers of Chronicle House, The | The Charter Chroniclers of Chronicle House | 1923 | 2 | |
| Cercle des Echoliers | Cercle des Echoliers | 1892 | 1 | |
| Century Players, The | The Century Players | 1904 | 1 | |
| Century Center for the Performing Arts | Century Center for the Performing Arts | 1998 – 2002 | 12 | |
| CentrStage | CentrStage | 2000 | 1 | |
| Centro Teatrale Bresciano | Centro Teatrale Bresciano | 1980 – 2020 | 22 | 1 |
| Centro Produzione Teatrale Nuovo Politecnico di Roma | Centro Produzione Teatrale Nuovo Politecnico di Roma | 1993 – 1994 | 2 | |
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