| Christ's Hospital School | Christ's Hospital School | England, Horsham, Christ's Hospital | 2018-10-08 | -- | 2018 | 1 | |
| Compass Theatre | Compass Theatre | England, Ickenham, Middlesex, Glebe Ave, Uxbridge | 2007-02-14 | 2007-02-17 | 2007 | 1 | |
| Curve | Curve | England, Leicester, 60 Rutland St | 2017-10-23 | 2017-10-28 | 2017 | 1 | |
| Capstone Theatre | Capstone Theatre | England, Liverpool, Shaw Street | 2013-10-07 | 2014-10-13 | 2013–2014 | 2 | |
| Christchurch Studio Theatre | Christchurch Studio Theatre | England, London | 1951-03-06 | 1951-03-11 | 1951 | 1 | |
| Century Theatre | Century Theatre | England, London | 1927-01-17 | 1930-05-08 | 1927–1930 | 3 | |
| Covent Garden Festival | Covent Garden Festival | England, London | 1990-09- | -- | 1990 | 1 | |
| Chanticleer Theatre Club | Chanticleer Theatre Club | England, London | 1945-02-24 | 1945-04-29 | 1945 | 3 | |
| Coronet Theatre, The | The Coronet Theatre | England, London, 103 Notting Hill Gate | 2022-02-24 | 2022-04-02 | 2022 | 1 | |
| Criterion Theatre | Criterion Theatre | England, London, 2 Jermyn Street | 1891-06-02 | -- | 1891–1973 | 7 | |
| Chelsea Palace Theatre | Chelsea Palace Theatre | England, London, 232 - 242 Kings Road | 1921-05-01 | -- | 1921 | 1 | |
| Courtyard Theatre, The | The Courtyard Theatre | England, London, Bowling Green Walk, 40 Pitfield St, | 2013-01-09 | 2013-01-20 | 2013 | 1 | |
| Cripplegate Institute | Cripplegate Institute | England, London, Brackley Street | 1905-11-28 | -- | 1905 | 1 | |
| Cambridge Theatre | Cambridge Theatre | England, London, Earlham St | 1970-06-29 | -- | 1970–1982 | 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 | |
| Comedy Theatre | Comedy Theatre | England, London, Panton Street | 1960-01-05 | 2001-07-14 | 1960–2001 | 2 | |
| Cottesloe Theatre | Cottesloe Theatre | England, London, Stage Door Avenue | 1987-05-06 | 2009-04-29 | 1987–2009 | 2 | |
| Capitol Theatre | The Capitol Theatre | England, Manchester | 2008-10-08 | 2008-10-11 | 2008 | 1 | |
| Contact Theatre | Contact Theatre | England, Manchester, Oxford Rd, Manchester M15 6JA, United Kingdom | 2024-04-02 | 2024-04-06 | 2024 | 1 | |
| Coliseum Theatre | Coliseum Theatre | England, Oldham, Lancashire, Fairbottom St | 2006-04-04 | 2006-04-05 | 2006 | 1 | |
| Canal House | Canal House | England, Oxford, Bulwarks Ln | 2014-03-29 | 2014-03-30 | 2014 | 1 | |
| Charter Theatre | Charter Theatre | England, Preston, Guild Hall, Lancaster Rd | 2011-04-15 | 2011-04-16 | 2011 | 1 | |
| Citadel Arts Centre, The | The Citadel Arts Centre | England, Saint Helens, Waterloo St | 2013-09-16 | -- | 2013 | 1 | |
| Crucible Theatre | Crucible Theatre | England, Sheffield, 55 Norfolk St | 2010-02-11 | 2010-03-20 | 2010 | 1 | |
| Crucible Studio | Crucible Studio | England, Sheffield, South Yorkshire, 55 Norfolk Street | 1976-04-21 | 1999-06-19 | 1976–1999 | 3 | |
| Civic Hall | Civic Hall | England, Stratford-upon-Avon, 14 Rother Street | 2006-03-29 | 2006-04-01 | 2006 | 1 | |
| Cotswold Playhouse | Cotswold Playhouse | England, Stroud, Gloucestershire, Parliament St | 2012-11-09 | 2012-11-17 | 2012 | 1 | |
| Cordes Hall | Cordes Hall | England, Sunninghill, Berkshire, 2 High Street | 2002-05-09 | 2002-05-18 | 2002 | 1 | |
| Customs House, The | The Customs House | England, Tyne and Wear, South Shields | 2014-10-06 | 2014-10-06 | 2014 | 1 | |
| Cochrane Theatre | Cochrane Theatre | England, WC1B 4AP, Southampton Row | 2009-11-05 | 2009-11-07 | 2009 | 1 | |
| Castle, the | The Castle | England, Wellingborough, 10 Castle Way | 2011-03-31 | 2014-10-22 | 2011–2014 | 3 | |
| Connaught Theatre | Connaught Theatre | England, Worthing, West Sussex, 3 Union Place | 1994-03-08 | 2014-09-25 | 1994–2014 | 3 | |
| Chalvignac - Château de Miremont | Chalvignac - Château de Miremont | France | 2023-08-03 | 2023-07-21 | 2023 | 1 | |
| Comédie de Caen - Théâtre des Cordes | Comédie de Caen - Théâtre des Cordes | France, 32 rue des Cordes, Caen | 1973-10-16 | 2013-04-18 | 1973–2013 | 3 | |
| Centre Dramatique National de Reims | Centre Dramatique National de Reims | France, 51100 Reims, 3 Chaussée Bocquaine | 2023-12-13 | 2023-12-15 | 2023 | 1 | |
| Comédie de Picardie | Comédie de Picardie | France, Amiens, 62 Rue des Jacobins | 1999-02-25 | 1999-03-07 | 1999 | 1 | |
| CIRCa | CIRCa | France, Auch, Allée des Arts | 2019-03-22 | -- | 2019 | 1 | |
| Cour du Lycee Saint-Joseph | Cour du Lycee Saint-Joseph | France, Avignon, 62 Rue des Lices | 2017-07-15 | 2017-07-20 | 2017 | 1 | |
| Cour d'Honneur du Palais des Papes | Cour d'Honneur du Palais des Papes | France, Avignon, Place du Palais des papes | 2004-07-16 | 2004-07-25 | 2004 | 1 | |
| Centre Dramatique National Besançon Franche-Comté | Centre Dramatique National Besançon Franche-Comté | France, Besançon, Avenue Edouard Droz Esplanade Jean-Luc Lagarce | 2007-01-17 | 2008-05-18 | 2007–2008 | 2 | |
| Comédie de Béthune, La | La Comédie de Béthune | France, Béthune, 138 Rue du 11 Novembre | 2010-11-30 | 2010-12-10 | 2010 | 1 | |
| Cannes | Cannes | France, Cannes | -- | -- | | | |
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