University of Groningen
American History: Biographies: Thomas Jefferson
This resource provides a biography of Thomas Jefferson that includes information on his early career, prelude to the presidency, and his presidency.
Colonial Williamsburg Foundation
Colonial Williamsburg: Thomas Jefferson, Son of Virginia
Excerpted from the Colonial Williamsburg Journal, this essay offers details of Thomas Jefferson's life and his long and varied career.
Smithsonian Institution
National Museum of American History: American Presidency: Jefferson's Resolution
Reviews Thomas Jefferson's decision to acquire the Louisiana Territory.
Discovering Lewis & Clark
Discovering Lewis & Clark: The Louisiana Purchase
Website detailing the events leading up to the Louisiana Purchase and the actual deal that took place.
Digital History
Digital History: The Louisiana Purchase
Find out about the serendipitous sale of the whole of the Louisiana Province by Napoleon to the Americans for $15 million dollars.
Independence Hall Association
U.s. History: Westward Expansion: The Louisiana Purchase
Read about the fortuitous purchase made that doubled the size of the United States. See why Napoleon was willing to sell the land, and find out about the quandary Thomas Jefferson was in as he had to go against his strict construction...
Discovering Lewis & Clark
Discovering Lewis & Clark: America in 1803
This section of the larger Discovering Lewis & Clark website explores in detail America in 1803 and delves into the Louisiana Purchase, Thomas Jefferson, and political geography among other topics.
Ducksters
Ducksters: History: Louisiana Purchase for Kids
Kids learn about the Louisiana Purchase which is when President Thomas Jefferson bought land west of the Mississippi from the French.
Digital History
Digital History: Jeffersonians in Office [Pdf]
This is a great overview of both the Jefferson Administration and the Madison administration. Read about the Louisiana Purchase, trade problems, the War of 1812, and the downfall of the Federalists. A great resource. [pdf]
Other
Lewis and Clark Today
The home page for this site changes every day. See where Lewis and Clark are on the day of the home page, or search for a specific day over the period of time that the Corps of Discovery was afield. Find parts of the journals of Lewis...
Pennsylvania Historical and Museum Comission
Explore Pa History: Lewis and Clark in Pennsylvania
Discover the role Lewis and Clark played in history of Pennsylvania in this detailed account. Contained within this site are links to video, maps, and pictorial images of this era.