U.S. History
- Laser Technology
- Latin School
- Latinos
- Lebanese Americans
- Legal Tender cases
- lend-lease
- Lewis and Clark expedition
- Liberal party (Canada)
- Liberal Republican Party
- Liberty Bell
- Liberty party
- Light rail vehicles
- Lincolns Second Inaugural Address
- Line-Item Veto
- Literature
- Little League
- Logrolling
- Lost Battalion
- Louisiana Purchase
- Loyalists