Librarian of Congress James H. Billington
  1. Daniel J. Boorstin (1975-1987)
  2. Lawrence Quincy Mumford (1954-1974)
  3. Luther Evans (1945-1953)
  4. Archibald MacLeish (1939-1944)
  5. Herbert Putnam (1899-1939)
  6. John Russell Young (1897-1899)
  7. Ainsworth Rand Spofford (1864-1897)
  8. John G. Stephenson (1861-1864)
  9. John Silva Meehan (1829-1861)
  10. George Watterston (1815-1829)
  11. Patrick Magruder (1807-1815)
  12. John James Beckley (1801-1807)