Dictionaries, Thesauruses, Pictures, and Press Releases
- Letters from Widows to Lincoln Asking for Help (1861 and 1864)
- Letters of Abigail and John Adams (1776)
- Letters of Eliza Wilkinson (c. 1780)
- Lever Act
- Liberia, Relations with
- Libertarians
- Liberty Incident
- Liberty Loans
- Liberty Poles
- Liberty, Concept of
- Liberty-Cap Cent
- Libraries, Presidential
- Licenses to Trade
- Life at Valley Forge (1777–1778, by Albigence Waldo)
- Life Cycle: Adolescence
- Life Cycle: Elders/Old Age
- Life Cycle: Overview
- Life Of Ma-Ka-Tai-Me-She-Kai-Kiak, or Black Hawk (c. 1832, by Black Hawk)
- Lifesaving Service
- Lighthouse Board