1. The Papers of George Washington, University of Virginia
1. George Washington Papers, Library of Congress
1. Subject search in CBBcat on:
1-4. Founders Online, National Archives. "George Washington, Benjamin Franklin, John Adams (and family), Thomas Jefferson, Alexander Hamilton, and James Madison. Over 181,000 searchable documents, fully annotated, from the authoritative Founding Fathers Papers projects." Also see Early Access, "'early versions' of transcribed documents that have not yet been fully annotated and published by the editors".
1-4. Rotunda Founders Early Access. Free pre-publication access to "letters and other papers penned by important figures such as James Madison, John Adams, George Washington and Thomas Jefferson."
2. Subject search in CBBcat on:
Adams, John, 1735-1826 -- Correspondence
3. Thomas Jefferson Papers, 1606 to 1827, Library of Congress
3. Subject search in CBBcat on:
4. James Madison Papers, 1723 to 1859, Library of Congress
4. Subject search in CBBcat on:
5. James Monroe Papers, Library of Congress
7. Andrew Jackson Papers, Library of Congress
7. The Papers of Andrew Jackson, University of Tennessee, Knoxville
8. Martin Van Buren Papers, 1787 to 1910, Library of Congress
9. William Henry Harrison Papers, Library of Congress
10. John Tyler Papers, Library of Congress
11. James K. Polk Papers, Library of Congress
11. The James K. Polk Project, University of Tennessee, Knoxville
13. Millard Fillmore Papers, Library of Congress
14. Franklin Pierce Papers, Library of Congress
15. James Buchanan and Harriet Lane Johnston Papers, Library of Congress
16. Abraham Lincoln Papers at the Library of Congress, Library of Congress
18. Ulysses S. Grant Papers, Library of Congress
28. Woodrow Wilson Papers, Library of Congress
Please ask about other sources of presidential papers.
Presidential libraries, from the National Archives and Records Administration (NARA)
For archived Executive Branch department websites, use the Wayback Machine from the Internet Archive.
End of Term Web Archive, a collaborative effort to harvest "the Federal Government domains (.gov, .mil, .org, etc.)" at the end of one administration and "to document changes in the federal government websites as agencies transitioned" to the next.
Digital Collections on Government, Law & Politics, including some presidential papers, from the Library of Congress.
Vice Presidential Records. Information from the National Archives.