![Librarian of Congress James H. Billington](https://webarchive.library.unt.edu/web/20130227224517im_/http://www.loc.gov/about/images/about_librarian.jpg)
- Daniel J. Boorstin (1975-1987)
- Lawrence Quincy Mumford (1954-1974)
- Luther Evans (1945-1953)
- Archibald MacLeish (1939-1944)
- Herbert Putnam (1899-1939)
- John Russell Young (1897-1899)
- Ainsworth Rand Spofford (1864-1897)
- John G. Stephenson (1861-1864)
- John Silva Meehan (1829-1861)
- George Watterston (1815-1829)
- Patrick Magruder (1807-1815)
- John James Beckley (1801-1807)