Collection
- Lewis Bank papers, 1854-1957, Date acquired: 03/10/1966, bulk 1871-19251
- Lewis S. Moore Collection, 1862-19311
- Library of the Spoken Word Collection, 1891-20061
- Lois Deicke Rare Tropical Fruits and Vegetables Book Collection, 1811-19841
- Louis Miano Theater Collection, 1896-20171
- Love-Scarborough Papers, 1835-1936, Date acquired: 05/25/19591
- Loy Glenn Westfall Cigar Industry Research collection, 1860-1982, Date acquired: 00/00/20151
- Lue Gim Gong collection, 1886-1935, Acquired1
- MacGowan Gift, 1825-1959, Date acquired: 01/01/1968, bulk 1825, 1831, 1928, 19591
- Mahan collection of American humor and cartoon art, 1813-2005, Date acquired: 00/00/2006, bulk 1928-19651
- Mana-Zucca Collection, 1912-19891
- Manuscripts – Single Items Collection, 1818-19711
- Marion Hay Collection, 1891-19801
- Marion Rinhart Photographs Collection, 1860-1952, bulk 1875-19341
- Marti Colon cemetery collection, 1887-2000, Date acquired: 12/01/2012, bulk 1887-19901
- Marvin & Sybil Weiner Spirit of America Collection Pamphlets -- Speeches, 1746-19321
- Marvin Dunn Collection, bulk 1843-20091
- Marvin and Sybil Weiner Spirit of America Collection -- Manuscripts, 1663 - 1977, Date acquired: 11/00/20121
- Marvin and Sybil Weiner Spirit of America Collection Pamphlets -- Almanacs, 1761-19071
- Marvin and Sybil Weiner Spirit of America Collection Pamphlets -- Congressional, 1764-1953, bulk 1764-19531