- L. Henry Smith Family Papers, 1823/1878, bulk 1850/18741
- Laine family papers, 1772/19618
- Lambert-Sheetz Family Papers, 1818/19072
- Lancaster, Pennsylvania Poetry Journals, 1828/1835, bulk 1831/18342
- Land Deeds and Agreements, 1832/18701
- Land Grants, 1749/19851
- Land Grants, 1795/18361
- Land Papers Miscellaneous, 1803/19331
- Land Papers from Eastern West Virginia, 1783/1848, bulk 1820/18291
- Land Records of the MVLA, 1858/20061
- Land Surveys, 1815/19431
- Landon Duncan Letters, 1812/18372
- Lantz Family Papers, 1814/19216
- Larry Jones, Collector, Postcards, Photographs, and Other Material, 1785/1993, bulk 1897/19931
- Latane Family Papers
1650-189810