- Lamb Studios archive
- Landauer collection of aeronautical prints and drawings
- Latrobe architectural drawing archive (Library of Congress)
- Lawrence & Houseworth photographs of Northern California and Western Nevada from the series ...
- Liljenquist Family collection (Library of Congress)
- Lomax photograph collection depicting folk musicians, primarily in the southern United States and ...
- Look magazine photograph collection (Library of Congress)
- Lot filing series for groups of photographs, prints, and drawings (Library of Congress)