Collection
- Susan MacManus collection, 1992-2005, Date acquired: 00/00/20181
- Suzanne Wadley Jaworski Rhodenbaugh papers, 1961-2026, Date acquired: 05/01/20171
- Suzie Siegel collection, 1990-20021
- Sylwester B. Knap papers, 1939-2002, Date acquired: 12/11/2002, bulk 1939-19451
- T.H.R.O. records, 1974-2002, bulk 1990-1993, 1998-20021
- Tampa Audubon Society Slide collection, 1900-2005, Date acquired: 01/01/2015, bulk 1960-20051
- Tampa Union Station records, 1912-19731
- Temple Terrace Beacon newspaper collection, 1978-20081
- Temple Terrace Garden Club, 1947-2015, Date acquired: 00/00/2018, bulk 1980-20101
- Test Hyams, 1800-22001
- The Cuban Human Rights Collection, 1983-2004, Date acquired: 2005, bulk 1990-19991
- The Florida Citrus Mutual Minute Books, 1949-20111
- The Florida Citrus Reporter Collection, 1974-2005, 2009-20151
- The League of Women Voters of the St. Petersburg area pamphlet collection, 1965-20001
- The Martin Dyckman Leroy Collins Research Collection, 1909-2005, Date acquired: 00/00/2005, bulk 1950-19701
- The Watermark newspaper, 1994-20121
- Theodore Oxman collection, 1942-2013, Date accessioned: 2001-11-221
- Thomas C. Cartwright papers, 1945-2014, Date acquired: 05/20/2014, bulk 1995-20041
- Thomas Wolfe Ephemera Collection, 1969-20081
- Tillman Joe Rutledge collection, 1924-2002, Date acquired: 08/17/1998, bulk 1941 - 19451