| Almeida Theatre | Almeida Theatre | England, London, Almeida St | 1984-04-21 | 2018-12-01 | 1984–2018 | 10 | |
| Arts Theatre | Arts Theatre | England, London, 6-7 Great Newport Street | 1928-03-18 | -- | 1928–1950 | 3 | |
| Arts Theatre Club | Arts Theatre Club | England, London, 50 Frith St | 1928-11-13 | 1947-02-02 | 1928–1951 | 9 | |
| Aldwych Theatre | Aldwych Theatre | England, London, 49 Aldwych | 1967-06-14 | 1973-06-02 | 1967–1991 | 6 | |
| Avenue Theatre | Avenue Theatre | England, London, 268 Northfield Avenue | 1892-04-19 | 1896-12-19 | 1892–1896 | 3 | |
| Arcola Theatre Studio 2 | Arcola Theatre Studio 2 | England, London, 24 Ashwin Street | -- | -- | | | |
| Arcola Theatre | Arcola Theatre | England, London, 24 Ashwin St | 2003-02-04 | 2011-07-30 | 2003–2011 | 5 | |
| Arcola Theatre Studio 1 | Arcola Theatre Studio 1 | England, London, 24 Ashwin St | -- | -- | | | |
| Albert Hall | Albert Hall | England, Leeds, Cookridge Street | 1909-02-18 | -- | 1909 | 3 | |
| Adel Memorial Hall | Adel Memorial Hall | England, Leeds, Church Lane, Adel | 2013-04-24 | 2013-04-27 | 2013 | 1 | |
| Arthur Cotterell Theatre | Arthur Cotterell Theatre | England, Kingston-upon-Thames, Kingston Hall Rd | 2012-03-17 | -- | 2012 | 2 | |
| Assembly Rooms Theatre | Assembly Rooms Theatre | England, Durham, 40 N Bailey | 2022-10-05 | 2022-10-08 | 2022 | 1 | |
| Ashcroft Theatre | Ashcroft Theatre | England, Croydon, Park Lane | 1962-11-19 | 1972-06-10 | 1962–1972 | 2 | |
| ADC Theatre | ADC Theatre | England, Cambridge, Park St | 1999-10-02 | 2022-03-12 | 1999–2022 | 4 | |
| Artrix | Artrix | England, Bromsgrove, Slideslow Drive | 2018-05-17 | -- | 2018 | 1 | |
| Alma Theatre | Alma Theatre | England, Bristol, 18-20 Alma Vale Road | 2007-04-17 | 2017-03-18 | 2007–2017 | 3 | |
| Alhambra Theatre | Alhambra Theatre | England, Bradford, Morley St | 1993-05-21 | 1993-05-22 | 1993 | 1 | |
| Alexandra Theatre | Alexandra Theatre | England, Birmingham, Suffolk Street Queensway | 1972-05-08 | -- | 1972 | 1 | |
| Alnwick Playhouse | Alnwick Playhouse | England, Alnwick, Bondgate Without | 2007-06-01 | 2014-10-07 | 2007–2022 | 3 | |
| American University, AUC, The | The American University, AUC | Egypt, Cairo, Tahrir Square | 1995-10- | 2013-10-12 | 1995–2013 | 3 | |
| al-Qāhira | al-Qāhira (Cairo) | Egypt, Cairo | 1949-- | 1954-- | 1949–2006 | 3 | |
| Alhosabir Theater | Alhosabir Theater | Egypt, Cairo | 2013-01-05 | -- | 2013 | 1 | |
| Al Iskandariyah | Al Iskandariyah (Alexandria) | Egypt, Alexandria | 1892-03-15 | 2006-06-29 | 1892–2006 | 3 | |
| Aarhus Teater | Aarhus Teater | Denmark, Aarhus, Skolegade 9 | 1871-12-14 | 2021-10-16 | 1871–2021 | 48 | |
| Aarhus | Aarhus | Denmark, Aarhus | 1874-01-30 | -- | 1874 | 1 | |
| Aalborg Teater | Aalborg Teater | Denmark, Aalborg, Jernbanegade 11 | 1875-04-20 | 2014-10-04 | 1875–2014 | 32 | |
| Aalborg | Aalborg | Denmark, Aalborg | 1873-10-30 | -- | 1873–1874 | 2 | |
| Aveny Teatret | Aveny Teatret | Denmark, Frederiksberg, Frederiksberg Allé 102 | 1986-12-11 | -- | 1986 | 1 | |
| Amatørteatret | Amatørteatret | Denmark, Brabrand | 1991-03-14 | 1991-03-25 | 1991 | 1 | |
| Asnæs | Asnæs | Denmark, Asnæs | -- | -- | | | |
| ARCHA+ | ARCHA+ | Czech Republic, Prague, Na Poříčí 26 | 2025-06-29 | -- | 2025 | 1 | |
| ARTos Cultural and Research Foundation | ARTos Cultural and Research Foundation | Cyprus, Nicosia, 64 Ayion Omoloyiton Avenue | 2018-04-16 | 2018-04-27 | 2018 | 1 | |
| Argos Teatro | Argos Teatro | Cuba, Havanna | 2012-11-24 | -- | 2012 | 1 | |
| Anfiteatro Fenice | Anfiteatro Fenice | Croatia, Rijeka | 1897-05-25 | -- | 1897 | 1 | |
| Auditorium Santa Ana | Auditorium Santa Ana | Colombia | 2024-04-15 | 2024-04-15 | 2024 | 1 | |
| Aranya Theater | Aranya Theater (Aranya Theatre) | China, Hebei, Qinhuangdao | 2023-06-23 | 2023-06-25 | 2023 | 1 | |
| Auditorio Municipal de La Pintana | Auditorio Municipal de La Pintana | Chile, La Pintana | 2011-11- | -- | 2011 | 1 | |
| Arts Club Theatre | Arts Club Theatre | Canada, Vancouver, Johnston Street | 1978-03-09 | -- | 1978 | 1 | |
| Alumnae Theatre Company | Alumnae Theatre Company | Canada, Toronto, 70 Berkeley St | 2010-11-12 | 2010-11-27 | 2010 | 1 | |
| Avon Theatre | Avon Theatre Stage | Canada, Stratford, 99 Downie St. | 1977-06-06 | 1977-10-15 | 1977–1987 | 2 | |
| Augustana Theatre | Augustana Theatre | Canada, Camrose, 4901 46 Ave | 2007-03-15 | 2011-11-26 | 2007–2011 | 2 | |
| Arts Centre Theatre | Arts Centre Theatre | Canada, Calgary | 1968-02-28 | -- | 1968 | 1 | |
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