| Companhia Lucinda Simões | Companhia Lucinda Simões | 1899 | 9 | |
| Companhia Portuguesa de Bailado Contemporâneo | Companhia Portuguesa de Bailado Contemporâneo | 2020 | 2 | |
| Companhia Teatral do Chiado | Companhia Teatral do Chiado | 1998 – 2005 | 2 | |
| Compañía de Daniel Veronese | Compañía de Daniel Veronese | 2009 – 2011 | 27 | |
| Compañía de José Tallaví | Compañía de José Tallaví | 1904 | 7 | |
| Compañía de Palencia-Tubau | Compañía de Palencia-Tubau | 1903 | 1 | |
| Compañía Fagés-Pigrau | Compañía Fagés-Pigrau | 1900 | 3 | |
| Compañía Valderrabanos, Witemberg y Romo, La | La Compañía Valderrabanos, Witemberg y Romo | 2010 | 1 | |
| Company B | Company B | 1988 – 1989 | 3 | |
| Company Leptourgeion | Company Leptourgeion | 2023 | 1 | |
| Company of Ten | Company of Ten | 2006 – 2013 | 2 | 1 |
| Company OnStage | Company OnStage | 2005 | 2 | 2 |
| Compass Theatre Company | Compass Theatre Company | 1993 – 1999 | 94 | |
| Compassion Theater Company | Compassion Theater Company | 2009 – 2011 | 2 | |
| Cooperativa La Fabbrica dell'Attore | Cooperativa La Fabbrica dell'Attore | 1981 – 1993 | 10 | |
| Cornell Dramatic Club, The | The Cornell Dramatic Club | 1909 – 1964 | 5 | |
| Coro del Maggio Musicale Fiorentino | Coro del Maggio Musicale Fiorentino (Maggio Chorus) | 2024 | 1 | |
| Coro del Teatro Lirico di Cagliari | Coro del Teatro Lirico di Cagliari | 2024 | 1 | |
| Coro del Teatro Massimo Bellini | Coro del Teatro Massimo Bellini | 2024 | 1 | |
| Court Theatre | Court Theatre | 1981 – 2022 | 3 | |
| Creative Arts Center | Creative Arts Center | 1975 | 1 | |
| Creative Victoria | Creative Victoria | 2024 | 1 | |
| Criterion Independent Theatre | Criterion Independent Theatre | 1897 | 1 | |
| CSU Department of Theatre | CSU Department of Theatre | 2004 | 1 | |
| CT2 TV | CT2 TV | 2005 | 1 | |
| Cutty Sark Tall Ships’ Race | Cutty Sark Tall Ships’ Race | 2001 | 1 | |
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