Collection
- Jacksonville, Florida, Historical Newspapers Collection, 1890-20121
- Jacqueline Woodson collection, 2001-2003, 20081
- Jaffe Family Archives, 1881-2012, bulk 1940-20121
- James E. Shepherd Jr. Papers, 1965-20151
- James Elliott Collection, 1960-20101
- James J. Harkins collection, 1970-2016, Date acquired: 00/00/20161
- James and Joanna Tokley papers, 1920-2010, 2011-101
- Jan Reiner research file, bulk 1909-20101
- Jean Trebbi ABC Book Collection, 1852-20091
- Joe Knetsch papers, 1992-20081
- Joel Strack papers, 1989-20191
- John B. Sozzio papers, 1944-2002, bulk 1944-19451
- John Carpenter collection, 1957-2018, Date acquired: 00/00/20181
- John F. Cawley Collection, 1944-2010, Date acquired: 06/19/00091
- John T. Dizer papers, 1853-2007, Date acquired: 00/00/20071
- John W. Senders Working Collection, 1880-20141
- Joil (Saul) Alpern transcript, 1940-2009, Date acquired: 02/27/20091
- Jose M. Colon Collection, 1945-20101
- Joseph Jennings transcript, 1922-2008, Date acquired: 12/07/2001, bulk 1941-19451
- Juan Martinez Collection, bulk 1955-20131