| La Caja de Fósforos | La Caja de Fósforos | 2023 | 1 | |
| Loft Theatre Company, The | The Loft Theatre Company | 2007 – 2018 | 2 | |
| Lotten Dorschs sällskap | Lotten Dorschs sällskap | 1892 | 2 | |
| Landmark Productions | Landmark Productions | 2023 | 1 | |
| L.A. Theatre Works | L.A. Theatre Works | 1997 – 2011 | 3 | |
| Landestheater Linz (Kleine Bühne) | Landestheater Linz (Kleine Bühne) | 1919 – 1920 | 4 | |
| Lantern Theater Company, The | The Lantern Theater Company | 1999 – 2005 | 2 | |
| Lwowski Teatr Ludowy | Lwowski Teatr Ludowy | 1912 | 1 | |
| Lillehammer Ballettskole | Lillehammer Ballettskole | 2006 | 1 | |
| Louisiana Players' Guild | Louisiana Players' Guild | 1937 | 1 | |
| Landestheater Meiningen | Landestheater Meiningen | 1923 | 1 | |
| La compagnia Ruotalibera | La compagnia Ruotalibera | 1989 | 2 | |
| Liberty Theatre Company, The | The Liberty Theatre Company | 2025 | 2 | |
| Lancaster University Theatre Group | Lancaster University Theatre Group | 2005 | 1 | |
|
|
