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Librarians of Congress
  • John J. Beckley (1802–1807)
  • Patrick Magruder (1807–1815)
  • George Watterston (1815–1829)
  • John Silva Meehan (1829–1861)
  • John Gould Stephenson (1861–1864)
  • Ainsworth Rand Spofford (1864–1897)
  • John Russell Young (1897–1899)
  • Herbert Putnam (1899–1939)
  • Archibald MacLeish (1939–1944)
  • Luther H. Evans (1945–1953)
  • Lawrence Quincy Mumford (1954–1974)
  • Daniel J. Boorstin (1975–1987)
  • James H. Billington (1987–2015)
  • David S. Mao* (2015)
  • Carla Hayden (2016–present)
Seal of the United States Library of Congress.svg
Acting librarian*
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