- 1 League of Nations
- 1 League Street
- 4 Leamington, England
- 7 Leary's books
- 1 Leather
- 3 Leather goods
- 13 Leather industry
- 207 Leaves
- 8 Leaves (plant components)
- 3 Leave-taking
- 1 Lebanon
- 1 Lebanon Cemetery
- 2 Lebanon County, Pennsylvania
- 8 Lecterns
- 62 Lectionaries
- 4 Lecture halls
- 3 Lectures
- 6 Ledgers (account books)
- 1 Lee, Richard Nelson, 1806-1872
- 3 Lee, Robert E. (Robert Edward), 1807-1870
- 87 Leech, John, 1817-1864
- 10 Leech, John, Mrs.
- 1 Leedom, Shaw & Stewart Philadelphia Carpet Mill
- 1 Leedom's Mill
- 2 Leeds, England
- 3 Lefferts, G.W. & Co. Worsted Yarn Mill
- 1 Leffler, Adam, 1805-1857
- 18 Legal documents
- 30 Legal literature
- 7 Legends (folk tales)
- 1 Legislating
- 1 Legislative acts
- 1 Legislative bodies
- 3 Legislative buildings
- 2 Legislators
- 1 Legs (animal components)
- 1 Lehigh (river)
- 37 Lehigh Avenue
- 2 Lehigh Avenue Branch
- 1 Lehigh Coal & Navigation Co.
