* The Library of Congress: The Library of Congress has a wealth of resources on Thomas Jefferson, including a detailed biography, a list of his writings, and a collection of photographs, prints, and other visual materials.
* The National Archives and Records Administration: The National Archives and Records Administration holds many of the original documents related to Thomas Jefferson, including his correspondence, speeches, and drafts of his writings. The website also provides information on Jefferson's life and career.
* Monticello: Jefferson's home, Monticello, is now a museum and research center dedicated to his life and legacy. The museum's website provides information on Jefferson's life, career, and political philosophy, as well as tours of the house and grounds.
* Thomas Jefferson Foundation: The Thomas Jefferson Foundation is a nonprofit organization dedicated to preserving and promoting Jefferson's legacy. The foundation's website provides information on Jefferson's life, career, and political philosophy, as well as educational resources and programs.