Former Owner
- L. C. Harper1
- Lady Frances Bentinck1
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lambach Abbey2
- Lambertus Eerens1
- Lane Theological Seminary1
- Latham family1
- Lathrop C. Harper, Inc.6
- Lathrop Colgate Harper15
- Laurence Claiborne Witten II6
- Laurence Hilliard1
- Laurence Kirby1
- Laurence Vaux1
- Laurence William Hodson7
- Laurent Campagne1
- Laurentius van der Torqel1
- Law Society1
- Lawrence J. Schoenberg37
- LeMare1