Collection
- Jacksonville, Florida, Historical Newspapers Collection, 1890-20121
- 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
- Jim Ellis Collection, 1885-19991
- 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
- Jose M. Colon Collection, 1945-20101
- Joseph Caltagirone papers, 1940-20231
- Juan Martinez Collection, bulk 1955-20131
- Judith and Warren Kaplan Collection, Women's and Gender Studies, 1792-2016, bulk 1900-20001
- Justice R. Fred Lewis Florida Supreme Court Papers, 1998-20181
- Keith Beauchamp Papers, 1950, 1955, 2001-2006, 2015, 2018, bulk 2001-20061