| Landestheater Altenburg | Landestheater Altenburg | Germany, Altenburg, Theaterplatz 19 | 1919-10-05 | -- | 1919–1980 | 6 | |
| LUX | LUX | Netherlands, Nijmegen, Mariënburg 38-39 | 2008-02-28 | 2008-03-22 | 2008 | 2 | |
| Leipzig | Leipzig | Germany, Leipzig | -- | -- | | | |
| Living Room Theatre | Living Room Theatre | United States of America, North Bennington, 1 Park St, VT 05257 | 2021-07-08 | 2021-07-24 | 2021 | 1 | |
| Linenhall Arts Centre | Linenhall Arts Centre | Ireland, Castlebar, Linenhall St | 2011-05-19 | -- | 2011 | 1 | |
| La Mama Theatre | La Mama Theatre | Australia, Carlton, 205 Faraday St | 2001-04-23 | 2013-09-29 | 2001–2013 | 2 | |
| Lichfield Garrick Theatre | Lichfield Garrick Theatre | England, Lichfield, Castle Dyke | 1901-05-13 | 2010-02-13 | 1901–2010 | 3 | |
| Laird Opera House | Laird Opera House | United States of America, Greenville | 1907-09-07 | 1907-09-07 | 1907 | 1 | |
| Leikfélag Akureyrar | Leikfélag Akureyrar | Iceland, Akureyri, Hafnarstræti 57 | 1993-10-15 | -- | 1993–1998 | 2 | |
| Loughborough Town Hall Theatre | Loughborough Town Hall Theatre | England, Loughborough, Leicestershire, Market Place | 2014-10-21 | 2014-10-21 | 2014 | 1 | |
| Little Theatre | Little Theatre | Ireland, Dublin, R127, Townparks, Skerries | 1912-05-17 | 1913-12-09 | 1912–1913 | 3 | |
| Leanor and Alvin Segal Theatre, The | The Leanor and Alvin Segal Theatre | Canada, Montreal, 5170 Chemin de la Côte-Sainte-Catherine | 2006-02-05 | 2006-05-26 | 2006 | 1 | |
| Lyric Theatre | Lyric Theatre | United States of America, Portland | 1908-07-07 | 1908-07-07 | 1908 | 1 | |
| Liepājas Jaunajā Teātris | Liepājas Jaunajā Teātris | Latvia, Liepaja | 1920-03-28 | -- | 1920–1935 | 3 | |
| La Coupole (Sénart) | La Coupole (Sénart) | France, Combs-la-Ville, 107 Rue Jean François Millet | 1999-03-12 | 2013-04-03 | 1999–2013 | 2 | |
| Le Volcan - Scène nationale du Havre | Le Volcan - Scène nationale du Havre | France, Le Havre, Espace Oscar Niemeyer | 2002-04-16 | 2019-01-10 | 2002–2019 | 5 | |
| Länsteatern i Örebro | Länsteatern i Örebro | Sweden, Örebro, Storgatan 1 | 1969-10-29 | 2007-04-29 | 1969–2007 | 5 | |
| Limelight Theatre | Limelight Theatre | United States of America, St. Augustine, 11 Old Mission Avenue | 2019-01-11 | 2019-02-03 | 2019 | 1 | |
| Lillhärdal | Lillhärdal | Sweden, Lillhärdal | 1989-10-06 | 1989-10-06 | 1989 | 1 | |
| Lødingen | Lødingen skole (Loedingen) | Norway, Lødingen | 1968-09-10 | -- | 1968–1983 | 4 | |
| Ludgo-Spelviks Bygdegård | Ludgo-Spelviks Bygdegård | Sweden, Nyköping, Ludgo-Spelviks Bygdegård | 2019-10-13 | 2019-10-13 | 2019 | 1 | |
| Little Theatre, Central Hall, Hillsdale College | Little Theatre, Central Hall, Hillsdale College | United States of America, Hillsdale, 33 E College St | 1933-12-19 | -- | 1933 | 1 | |
| Lyceum Theatre | Lyceum Theatre | United States of America, Scranton | 1911-12-27 | 1911-12-27 | 1911 | 1 | |
| Luton Library Theatre | Luton Library Theatre | England, Luton, Bridge St | 1985-01-30 | 1993-10-02 | 1985–1993 | 2 | |
| Leipziger Schauspielhaus | Leipziger Schauspielhaus | Germany, Leipzig, Sophienstrasse 19 | 1909-01-13 | -- | 1909–1928 | 8 | |
| La MaMa Experimental Theatre | La MaMa Experimental Theatre Club | United States of America, New York, 74 E 4th St | 1992-02-13 | 2002-02-03 | 1992–2002 | 2 | |
| Lwowski Teatr Ludowy | Lwowski Teatr Ludowy | Poland, Tarnów | 1906-10-01 | -- | 1906 | 1 | |
| Lindenhalle Wolfenbüttel | Lindenhalle Wolfenbüttel | Germany, Wolfenbüttel, Halberstädter Str. 1A | 2007-02-20 | -- | 2007 | 1 | |
| Lincoln Park | Lincoln Park | United States of America, Cleveland | 2011-08-05 | -- | 2011 | 1 | |
| Lenzburg | Lenzburg | Switzerland, Lenzburg | 1991-09-12 | -- | 1991 | 1 | |
| Lyngmyr ungdomsskole | Lyngmyr ungdomsskole | Norway, Tvedestrand | 1997-09-04 | 1997-09-06 | 1997 | 1 | |
| Linköping Teater | Linköping Teater | Sweden, Linköping | 1876-05-12 | 1884-01-06 | 1876–1884 | 4 | |
| Lola Montez-Saal | Lola Montez-Saal | Germany, Bad Brückenau, Heinrich-von-Bibra-Straße 25 | 2004-03-11 | -- | 2004–2011 | 2 | |
| Loft Theatre - Main House, The | The Loft Theatre - Main House | England, Leamington Spa, Victoria Terrace, Town Centre | 2007-10-17 | 2018-04-07 | 2007–2018 | 2 | |
| Little Theatre, the | The Little Theatre | England, Hertford, Balfour St | 2005-11-10 | 2005-11-17 | 2005 | 1 | |
| Lillestrøm | Lillestrøm | Norway, Lillestrøm | 1928-03-23 | -- | 1928 | 1 | |
| L'Espal | L'Espal | France, Le Mans, 60 Rue de l'Estérel | 2013-12-03 | 2014-02-26 | 2013–2014 | 2 | |
| Larvik | Larvik | Norway, Larvik | 1883-11-30 | 1971-10-05 | 1883–2005 | 15 | |
| Lyceum Theatre | Lyceum Theatre | United States of America, Harrisburg | 1904-05-12 | 1908-03-28 | 1904–1907 | 2 | |
| Lieksa | Lieksa | Finland, Lieksa | -- | -- | | | |
| Lappeenranta | Lappeenranta | Finland, Lappeenranta | 1973-08-01 | -- | 1973 | 1 | |
| Lessingtheater Wolfenbüttel | Lessingtheater Wolfenbüttel | Germany, Wolfenbüttel, Harztorwall 16 | 1943-09-04 | 1997-10-09 | 1943–1997 | 3 | |
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