| Circle Theater Company | Circle Theater Company | United States of America, Manhattan, Broadway and 83rd street | 1973-04-15 | -- | 1973 | 1 | |
| Circo Teatro Arena | Circo Teatro Arena | Argentina, Buenos Aires, Charcas 558 | 1961-- | -- | 1961 | 1 | |
| Circul de Granada | Circul de Granada | Spain, Gracia (Barcelona) | 1894-05-10 | 1894-05-10 | 1894 | 1 | |
| Círculo Republicano | Círculo Republicano | Spain, Baracaldo | 1908-02-07 | -- | 1908 | 1 | |
| Cirkusteatern | Cirkusteatern | Sweden, Göteborg | 1914-11-20 | 1914-11-29 | 1914 | 1 | |
| Citadel Arts Centre, The | The Citadel Arts Centre | England, Saint Helens, Waterloo St | 2013-09-16 | -- | 2013 | 1 | |
| Citadel Theatre | Citadel Theatre | Canada, Edmonton | 1972-03-22 | 1996-10-06 | 1972–1996 | 3 | |
| Citizen's Aid Building | Citizen's Aid Building | United States of America, Minneapolis, 4th Avenue South 8th Street | 1930-10-16 | -- | 1930 | 1 | |
| Citizen's Theatre | Citizen's Theatre | Scotland, Glasgow, 119 Gorbals Street | 1970-06-03 | 2009-05-30 | 1970–2009 | 5 | |
| City Club of New York | City Club of New York | United States of America, New York | 1907-02-26 | 1907-02-26 | 1907 | 1 | |
| City Lights Theater Company | City Lights Theater Company | United States of America, San Jose, 529 S Second St | 2013-03-21 | 2024-02-18 | 2013–2024 | 2 | |
| City Lit (John Lyons Hall) | City Lit (John Lyons Hall) | England, London, Keeley Street Covent Garden | 2008-07-12 | 2008-07-27 | 2008 | 1 | |
| City Lit Theater | City Lit Theater | United States of America, Chicago, 1020 W Bryn Mawr Ave | 2012-01-13 | 2012-02-11 | 2012 | 1 | |
| City Opera House | City Opera House | United States of America, Frederick | 1904-04-19 | 1912-02-16 | 1904–1912 | 2 | |
| City School Auditorium | City School Auditorium | United States of America, Monroe | 1914-03-12 | 1914-03-12 | 1914 | 1 | |
| City Stage Theatre | City Stage Theatre | United States of America, Kansas City, 30 W Pershing Rd | 2019-08-07 | 2019-08-25 | 2019 | 1 | |
| City Theatre of Independence | City Theatre of Independence | United States of America, Independence, 201 N Dodgion St | 1988-05-19 | 2003-02-02 | 1988–2003 | 2 | |
| Ciudad Real | Ciudad Real | Spain, Ciudad Real | 2010-03-25 | -- | 2010 | 1 | |
| Civic Centre Bismarck | Civic Centre Bismarck | United States of America, Bismarck | 1914-05-04 | 1914-05-04 | 1914 | 1 | |
| Civic Hall | Civic Hall | England, Stratford-upon-Avon, 14 Rother Street | 2006-03-29 | 2006-04-01 | 2006 | 1 | |
| Civic Repertory Theatre | Civic Repertory Theatre | United States of America, New York, 107 W. 14th St. (Sixth Ave) | 1926-11-01 | -- | 1926–1928 | 3 | |
| Civic Theatre | Civic Theatre | England, Darlington, Parkgate | 2004-02-24 | 2004-02-28 | 2004 | 1 | |
| Clark Center for the Performing Arts | Clark Center for the Performing Arts | United States of America, Arroyo Grande, 487 Fair Oaks Avenue | 1972-09-30 | 1972-10-09 | 1972 | 1 | |
| Clark Street Playhouse | Clark Street Playhouse | United States of America, Arlington, 601 S Clark St | 2008-02-07 | 2008-03-09 | 2008 | 1 | |
| Clark Theatre, Dillingham Center | Clark Theatre, Dillingham Center | United States of America, Ithaca, 953 Danby Rd | 2007-10-02 | 2007-10-07 | 2007 | 1 | |
| Clarksburg | Clarksburg | United States of America, Clarksburg | 1903-11-25 | 1903-11-25 | 1903 | 1 | |
| Classic Stage Company | Classic Stage Company | United States of America, New York, 136 E 13th St | 1981-11-08 | 2016-06-27 | 1981–2016 | 7 | |
| Classic Theatre, The | The Classic Theatre | United States of America, San Antonio, 1924 Fredericksburg Rd | 2017-11-03 | 2017-11-26 | 2017 | 1 | |
| Classical Theatre Company | Classical Theatre Company | United States of America, Houston, 4617 Montrose Blvd | 2016-02-03 | 2016-02-21 | 2016 | 1 | |
| Claustro de San Augustin | Claustro de San Augustin | Spain, Malaga, Calle San Agustín | 1991-07-24 | -- | 1991 | 1 | |
| Clavering Village Hall | Clavering Village Hall | England, Clavering, Saffron Walden, Hill Green | 2001-02-22 | 2001-02-24 | 2001 | 1 | |
| Cleveland Play House | Cleveland Play House | United States of America, Cleveland, 1901 E 13th St | 1922-02-10 | 1922-02-19 | 1922–1926 | 2 | |
| Clifford E. White Theater, The | The Clifford E. White Theater | United States of America, Flagstaff, 1115 S Knoles Dr | 2022-10-20 | 2022-10-23 | 2022 | 1 | |
| Cloquet | Cloquet | United States of America, Cloquet | -- | -- | | | |
| Close Theatre Club | Close Theatre Club | Scotland, Glasgow | 1968-09-25 | 1968-10-13 | 1968 | 1 | |
| Club Joplin | Club Joplin | United States of America, Webb City | 1908-10-20 | 1908-10-21 | 1908 | 1 | |
| Cluj-Napoca | Cluj-Napoca | Romania, Cluj-Napoca | 1910-05-06 | -- | 1910–2016 | 3 | |
| Clurman Theatre at Theatre Row | Clurman Theatre at Theatre Row | United States of America, New York, 412 W 42nd St | 2010-05-09 | 2021-11-20 | 2010–2021 | 2 | |
| Clwyd Theatr Cymru | Clwyd Theatr Cymru | Wales, Mold, Raikes Lane | 1993-11-01 | 2015-10-18 | 1993–2014 | 4 | |
| CMWS Hall Kildare | CMWS Hall Kildare | Ireland | 2019-03-04 | 2019-03-04 | 2019 | 1 | |
| Coal Mine Theatre | Coal Mine Theatre | Canada, Toronto, 2076 Danforth Ave | 2024-05-05 | 2024-05-26 | 2024 | 1 | |
| Cobia de Jos | Cobia de Jos | Romania, Cobia de Jos | -- | -- | | | |
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