James Hadley Billington was an American academic and author who taught history at Harvard and Princeton before serving for 42 years as CEO of four federal cultural institutions. He served as the 13th Librarian of Congress after being nominated by President Ronald Reagan in 1987, and his appointment was approved unanimously by the U.S. Senate. He retired as Librarian on September 30, 2015.

The librarian of Congress is the head of the Library of Congress, appointed by the president of the United States with the advice and consent of the United States Senate, for a term of ten years. The librarian of Congress also appoints and oversees the Register of Copyrights of the U.S. Copyright Office and has broad responsibilities around copyright, extending to electronic resources and fair use provisions outlined in the Digital Millennium Copyright Act. The librarian determines whether particular works are subject to DMCA prohibitions regarding technological access protection. In addition, the librarian appoints the U.S. poet laureate and awards the Gershwin Prize for Popular Song.