- L. C. Angle, Jr., Collection4
- L. Claire Kincannon theatre collection28
- L. Jane Hastings Architectural Papers10
- Lacrosse Records,4
- Land Records of the MVLA1
- Larkspur Press Collection1
- Larry Jones, Collector, Postcards, Photographs, and Other Material1
- Larry Levis papers58
- Larry McBryde Collection on the John McLaren McBryde Family3
- Larry Schecker playbills and pamphlets collection6
- Larry Schwab, Ophthalmology Professor, Books and Other Material1
- Larry Shaver, Collector, Isaac Asimov Collectibles1
- Laura Young Papers1
- Laurel Archer Copp Papers1
- Laurin L. Henry papers1