| Leipziger Universitätsverlag |
| Les Belles Lettres |
| Les Liens qui Libèrent |
| Leserwelt |
| Lettre Volée |
| Liana Levi |
| Libra |
| Libreria Editrice Vaticana |
| Libreria Musicale Italiana |
| Liguori |
| Lindau |
| Lippincott |
| List Lab |
| Lita |
| Little Brown & Co |
| Louis Audibert |
| LUISS University Press |
| Lux |
| Machado Libros |
| Macmillan |
| Magisterio |
| Magowan |
| Marbot Ediciones |
| Marchialy |
| Marcianum Press |
| Marcus Edizioni |
| Marsilio |
| Masson |
| Matthes & Seitz Berlin |
| Max Niemeyer |
| McGill-Queen's University Press |
| McGraw-Hill |
| Memorial |
| Metauro Edizioni |
| Mimesis |
| Minimum Fax |
| Mit Press |
| Mohr Siebeck |
| Mondadori |
| Mondadori Education |