A guide to some excellent online collections of his writings and manuscripts.
- Jefferson Quotes and Family Letters - Hundreds of quotes by and about Jefferson compiled by the staff of the Papers of Thomas Jefferson: Retirement Series
- Monticello Classroom Image Gallery - selected images of some of Jefferson's most important and interesting documents, most with transcriptions.
- Jefferson and the Declaration of Independence - an introduction to Jefferson's role in drafting the Declaration by Monticello historians.
- Founders Online - Searchable full-text collections of all the correspondence (and other writings) of the major founders of the United States.
- Thomas Jefferson Papers at the Library of Congress - the largest online collection of Jefferson documents, featuring (grayscale) scans and selected transcriptions.
- Coolidge Collection of Thomas Jefferson Manuscripts at the Massachusetts Historical Society - features high-quality color scans of Jefferson's Farm and Garden Books and the largest collection of Jefferson architectural drawings and land surveys.
- The Declaration of Independence at the National Archives and Records Administration - offers highest-quality digital scans of the Declaration of Independence along with a transcription and examinations of the document's history and influences.
- Search for Jefferson Documents in the Monticello Explorer - a small, but highly contextualized selection of Jefferson documents directly linked to related objects, details, and features of the Monticello house and plantation or featured in special presentations.
- Thomas Jefferson on Politics and Government - The University of Virginia's site for Jefferson political quotations.
- Papers of Thomas Jefferson (Library of Congress) - Use the Keyword search.
- Spurious "Jefferson" Quotes - a list of quotations wrongly attributed to Jefferson compiled by researchers at Monticello's Jefferson Library