Former Owner
- Librairie Tross1
- Library of the Dominicans of Paris1
- Libreria la Bibliofila1
- Libri, Edoardo, active 20th century1
- Lima Public Library4
- Linda Ehrsam Voigts4
- Lionel Tollemache, 4th Earl of Dysart2
- Lisa Kiser11
- Lisa Norris Elkins1
- Little family1
- Llanthony Priory1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn3
- Lodi Cathedral1
- Lodovicus Saltariellus1
- Loftus Bland1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis Charles Elson14
- Louis Charles Karpinski1
- Louis César de La Baume Le Blanc3