| Covent Garden Festival | Covent Garden Festival | England, London | 1990-09- | -- | 1990 | 1 | |
| College Hall, University of South Australia | College Hall, University of South Australia | Australia, Adelaide, University of South Australia | 1961-12-14 | 1961-12-15 | 1961 | 1 | |
| Crawfordsville | Crawfordsville | United States of America, Crawfordsville | 1903-10-30 | 1903-10-30 | 1903 | 1 | |
| Câlnic | Câlnic | Romania, Câlnic | -- | -- | | | |
| Croydon Repertory Theatre | Croydon Repertory Theatre | England, London, 23 Wellesley Road | 1932-10-17 | -- | 1932–1936 | 4 | |
| CC ´t Bruggeske | CC ´t Bruggeske (Cultuurcentrum Bruggeske Kapellen) | Belgium, Kapellen, Dorpsstraat 45 | 2006-12-06 | -- | 2006 | 1 | |
| Cineteatro Gavezzani | Cineteatro Gavezzani | Italy, Seriate, Via Carlo Cattaneo, 1, 24068 | 2021-10-01 | 2021-10-03 | 2021 | 1 | |
| Catania | Catania | Italy, Catania | 1892-06-23 | 1892-06-28 | 1892–1897 | 2 | |
| Culbertson Auditorium | Culbertson Auditorium | United States of America, Sterling, KS, 125 W. Cooper | 2025-01-31 | 2025-02-02 | 2025 | 1 | |
| Casino de Montbenon, Le | Le Casino de Montbenon | Switzerland, Lausanne, Allée Ernest-Ansermet 3 | 2008-09-10 | 2008-09-13 | 2008 | 1 | |
| CMWS Hall Kildare | CMWS Hall Kildare | Ireland | 2019-03-04 | 2019-03-04 | 2019 | 1 | |
| Comunale, Teatro | Teatro Comunale | Italy, Cormons, Via Nazario Sauro, 17 | 2017-01-24 | -- | 2017 | 1 | |
| Concord Main Stage | Concord Main Stage | United States of America, Concord, 1975 Diamond Blvd | 2012-07-23 | 2012-08-18 | 2012 | 1 | |
| CC Den Horinck | CC Den Horinck | Belgium, Asse, Noorderlaan 20 | 2000-10-10 | 2008-01-09 | 2000–2008 | 2 | |
| Casa Teatro Ragazzi | Casa Teatro Ragazzi | Italy, Torino, Corso Galileo Ferraris n. 266 10134 - Torino | 2014-05-23 | -- | 2014 | 1 | |
| Ciudad Real | Ciudad Real | Spain, Ciudad Real | 2010-03-25 | -- | 2010 | 1 | |
| Centre Agrícola i Social | Centre Agrícola i Social | Spain, Fortià, Carrer Sant Jordi, 12, 08733 | 2025-03-23 | -- | 2025 | 1 | |
| California Club | California Club | United States of America, San Francisco | 1906-12-06 | 1906-12-06 | 1906 | 1 | |
| Csokonai Színház Irodalmi Kamaraszínház | Csokonai Színház Irodalmi Kamaraszínház | Hungary, Debrecen, Kossuth utca 10 | 1947-03-02 | -- | 1947 | 1 | |
| Chipasula Secondary School | Chipasula Secondary School | Malawi, Lilongwe, Biwi Triangle Industrial Estate | 2006-04-30 | -- | 2006 | 1 | |
| Cherry Lane Theatre | Cherry Lane Theatre | United States of America, New York, 38 Commerce St | 1950-05-25 | -- | 1950 | 1 | |
| Cochrane Theatre | Cochrane Theatre | England, London, Southampton Row | 2009-11-05 | 2009-11-07 | 2009 | 1 | |
| Carriage House, Western Pennsylvania Family Center, The | The Carriage House, Western Pennsylvania Family Center | United States of America, Pittsburgh, 733 North Highland Avenue | 2003-08-08 | 2003-08-24 | 2003 | 1 | |
| Casa del Marino | Casa del Marino | Spain, Palmas de Gran Canaria | 1966-02-03 | -- | 1966 | 1 | |
| Curtis High School | Curtis High School | United States of America, Staten Island, 105 Hamilton Ave | 2006-10-03 | -- | 2006 | 1 | |
| Centre Culturel Aragon Triolet | Centre Culturel Aragon Triolet | France, Orly, 1 Place du Fer à Cheval, Rue du Docteur Calmette, | 2014-01-24 | 2014-01-24 | 2014 | 1 | |
| Conservatório Nacional de Teatro | Conservatório Nacional de Teatro | Portugal, Lisbon | 1928-03-20 | -- | 1928 | 3 | |
| Comedy Theatre | Comedy Theatre | Australia, Melbourne, 240 Exhibition Street | 1973-09-12 | 1973-10-06 | 1973 | 1 | |
| Cultuurcentrum De Spil | Cultuurcentrum De Spil | Belgium, Roeselare, Hippoliet Spilleboutdreef 1 | 2007-11-15 | -- | 2007 | 1 | |
| Cuina, La | La Cuina | Spain, Barcelona | 1993-11-05 | 1993-11-21 | 1993 | 1 | |
| Canberra Repertory Society | Canberra Repertory Society | Australia, Canberra | 1975-07-10 | 2019-03-02 | 1975–2019 | 2 | |
| Chai Skalli | Chai Skalli | France, Sète | 2013-01-29 | 2013-01-30 | 2013 | 1 | |
| Castillo de Doña Berenguela | Castillo de Doña Berenguela | Spain, Bolaños de Calatrava | 1975-07- | -- | 1975 | 1 | |
| Cass Theatre | Cass Theatre | United States of America, Cass City, 6464 Main Street | 1937-10-17 | -- | 1937 | 1 | |
| Constanţa | Constanţa | Romania, Constanţa | 1908-03- | -- | 1908 | 1 | |
| Casino Republicà (Barceloneta) | Casino Republicà (Barceloneta) | Spain, Barcelona | 1918-01-06 | -- | 1918 | 1 | |
| CC Bilzen | CC Bilzen | Belgium, Bilzen | 1998-10-24 | -- | 1998 | 1 | |
| Costa Rica | Costa Rica | Costa Rica | 2011-03-05 | 2011-03-10 | 2011 | 1 | |
| Center Stage, St. Lawrence Centre | Center Stage, St. Lawrence Centre | Canada, Toronto, 27 Front St E | 1985-04-11 | -- | 1985 | 1 | |
| Cultuurcentrum Deurne | Cultuurcentrum Deurne | Belgium, Deurne (Antwerpen), Frans Messingstraat 36 | 1999-03-18 | 1999-10-26 | 1999 | 2 | |
| Cinema Teatro Nuovo Varese | Cinema Teatro Nuovo Varese | Italy, Varese, Viale dei Mille, 39 | 2022-04-29 | -- | 2022 | 1 | |
| Certamen de Teatro de Zarandona | Certamen de Teatro de Zarandona | Spain, Murcia | 2010-06-15 | -- | 2010 | 1 | |
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