Collection
- George Day Stone Civil War Collection, bulk 1861-18801
- George Fraser Black Papers, 1737-1962, Date acquired: 06/01/19821
- George Harper Papers, 1872-19801
- Glasser Music Collection, bulk 1864-19991
- Goulding Family Collection, 1830-1967, Date acquired: 03/03/19731
- Government and personal papers, 1800-19501
- Gregory Family Notes and Notebook, 1781-1885, Gregory Family Notebook NOS since 20131
- Harrison Sayre Circus Collection, 1863-2001, Date acquired: 00/00/2010, bulk 1949-19941
- Haya papers, 1874-19351
- Henry B. Whitney Family Letters, bulk 1856-18861
- Henry Simpson papers, 1849-1919, Date acquired: 01/17/19801
- Herbert S. Phillips papers, 1870-1962, Date acquired: 00/00/19631
- Herman and Ida Herst Collection, 1690-19951
- Hester family collection, 1854-1987, Date acquired: 00/00/19951
- Hillsborough County, court records, 1833-1923, bulk 1893-18971
- Himes family papers, 1856-1994, Date acquired: 09/00/1994, bulk 1912-19941
- Historical Newspaper Collection, 1792-19451
- Historical Newspapers Collection, bulk 1776-20001
- Hollingsworth Papers, 1768-1887, 1916, bulk 1788-18871
- Howard, James William, Diary, 1861-1913, Date acquired: 00/00/19821