James F. Williams II is a retired American librarian. He was the Dean of Libraries at the University of Colorado at Boulder. He holds a bachelor's degree in sociology from Morehouse College (1966) and a master's degree in library science from Atlanta University. His wife, Nancy Allen, is also a librarian, the Dean of Libraries at the University of Denver. In 2002, Williams won the Melvil Dewey Medal of the American Library Association for his "distinguished service to the profession of librarianship".