- George Kossuth, Photographer, Photographs, 1904/19591
- Gibson Lamb Cranmer Papers regarding Statehood and Other Material, 1787/1895, bulk 1822/18811
- Goshorn Family Papers, 1827/19261
- H.E. Matheny, Collector and Compiler, Civil War Correspondence and Other Material, 1861/18651
- Henri Jean Mugler Diary and Memoir, 1838/18991
- Hook, Schrader and Company Account Books of a Horse-Drawn Carriage Company, 1872/18831
- Hubbard Family Papers, 1794/18801
- Hubbard Family Papers, 1810/19141
- J. R. Caldwell, Cow Herd Books, 1916/19231
- J. S. Algeo, An Unpublished History of the Hazel-Atlas Glass Company, Typed Document, 1885/19561
- J.B. Ford Correspondence, 18631
- J.B. Ford Legal Papers, 18771
- Jacob Minehart Ledger, 1841/18631
- Jessie Campbell Nave Diaries, 1891/18921
- Jim Comstock, Newspaper Editor and Collector, Papers, 1650/2003, bulk 1850/19951