The following institutions have significant collections of Thomas Jefferson and Jefferson family manuscripts; they are listed in order of size of the collection.
College of William and Mary
- Collection Title: Thomas Jefferson Papers, 1761-1931
- Collection Size: 267 items
- Guide: Finding Aid
- Provenance:
- Items of Interest:
- Access: All items in this collection have been scanned in color and are available through the library's online catalog. For instructions on accessing these items online, see instructions on the page linked above.
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American Philosophical Society
- Collection Title: Thomas Jefferson Papers, 1775-1825
- Collection Size: ca. 250 items
- Guide: Finding Aid
- Provenance: Presented to APS by Edwin Morris Betts in 1954.
- Access: Some of this collection is available on microfilm (4 reels). Selected items from this collection have been digitized. Links are provided within the online finding aid.
- Collection Title: Thomas Jefferson, letters to and from various persons, 1791-1840
- Collection Size: 63 items
- Guide: Finding Aid
- Access: Items are available on-site only.
- Items of Interest: This collection consists in large part of Jefferson's correspondence with Louis Hue Girardin, regarding Girardin's work on the fourth volume of The History of Virginia (1816).

The Historical Society of Pennsylvania
Library of Congress
- Online Catalog
- Collections & Services
- Thomas Jefferson Papers/Manuscripts
- "American Memory" digital library resources
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Massachusetts Historical Society
Missouri Historical Society
New York Historical Society
University of Virginia Library & Special Collections
- Online Catalog
- Click on "Catalog Access Only".
- Guide to The Thomas Jefferson Papers at the University of Virginia
- Search by name or keyword.
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Virginia Historical Society
