Julius C. Jefferson Jr. is an American librarian who was president of the American Library Association for the 2020–2021 term. In 2022 President Joe Biden appointed him to the National Museum and Library Services Board which advises the agency on general policies with respect to the duties, powers, and authority of the Institute of Museum and Library Services relating to museum, library, and information services, as well as the annual selection of the recipients of the National Medal for Museum and Library Service. Jefferson is additionally a section head of the Congressional Research Service at the Library of Congress, and served as the president of the Freedom to Read Foundation from 2013 to 2016.