- J. Ambler Johnston Papers, 1901/197420
- J. Calvitt Clarke Jr. Papers, 1954/19991
- J. Christopher Jones Papers, 1950/19752
- J. Clark Easton, Soldier, World War I Letters, Diaries, and Other Material, 1917/1963, bulk 1917/19191
- J. Davitt McAteer Papers regarding Mining Safety, 1860/2013, bulk 1970/201042
- J. Davitt McAteer, Collector, Records regarding Wanamie Mine and Other Material, 1940/19791
- J. Edward Grimsley certificates, 1951/19901
- J. Henry McCoy Papers, 1918/19762
- J. Hoge Tyler Diary, 1846/2009, bulk 1846/19251
- J. Hoge Tyler Family Collection, 1802/19564
- J. Kenneth Graham Collection, 1934/1986, bulk 1975/19852
- J. Montgomery Curtis, Journalist, Papers, 1891/19928
- J. Palin Thorley Papers, 1910/1987, bulk 1930/1986110
- J. Paul Hudson Papers, 1930/19983
- J. Preston Newman Papers, 1910/19752