Publishers – L
- L.T.P. Publishing
- La Casa Encendida
- La Montagne Secrete
- Ladybird
- Lak Publishing
- Lake Forest College
- Lake Press
- Lannoo
- Lansdowne Books
- Larkin Publications LLC
- Lars Muller Publishers
- Last Gasp, U.S.
- Latin America Bureau
- Laurence King Publishing
- Lawrence Erlbaum Associates Inc
- Leaping Hare
- Lector House
- Lee & Low Books Inc
- Lehigh University Press
- Lerner Publishing Group
- Les Editions M.A.C.S.
- Les Presse Du Reel
- Lesser Gods
- Letterland International
- Leu Verlag
- Leuven University Press
- Lexington Books
- Lexington-Fayette County Historic Commission
- Leyland Publications, U.S.
- Liberties Press
- Libraries Unlimited
- Library House Books
- Library of America
- Libreria Musicale Italiana
- Libri Publishing
- Libris
- LID Publishing
- Life Drawn
- Liffey Press
- Lilliput Press
- Limelight Editions
- Lion Books
- Lion Hudson Plc
- Liontree Publishing
- Lit Verlag
- Little Genius Books
- Little Island
- Little Snoring Ltd.
- Little Tiger Press
- Little, Brown & Company
- Liturgical Press
- Liveright Publishing Corporation
- Liverpool History Press
- Liverpool University Press
- Lives and Letters
- Living Archive Press
- LMH Publishing
- LMM
- Loft Publications
- LOM Art
- London Chamber Orchestra
- London College of Music
- London Stereoscopic Company
- Longman
- Lorenz Books
- Lorenz Publishing Company
- Lost Classics Book Co.
- Lost Horse Press
- Louisiana State University Press
- LSU Museum of Art
- LSU Press
- Luath Press
- Lucent Books
- Lulu.com
- Lund University Press
- Luster
- Lutheran University Press
- Lutterworth Press
- Lynne Rienner Publishers Inc
- Lyons Press