- L.S. Buffington Papers (109)
- La Prensa de Minnesota (702)
- La Raza Student Cultural Organization Records (122)
- Larson and McLaren Papers (54)
- Latvian American Collection (166)
- Law Library Photograph Collection (2)
- Le Rire - Journal Humoristique (513)
- Leo Marsh Papers (139)
- Leonard Mayo Papers (3)
- Leonhart Fuchs, Comparative Botanical Works (3)
- Liebenberg and Kaplan Papers (1310)
- Lincoln Del Collection (2)
- Little Sandy Review (30)
- Lloyd M. Short Papers (64)
- Log Cabin Library (12)
- Lou Bellamy Rare Book Collection (56)
- Louis Slobodkin Papers (2)
- Lower East Side Neighborhoods Association Records (10)
- Lucien Philippe Moretti - “Un sac de Billes” Lithographs (13)
- Lutheran Social Service of Minnesota (1)
