- Historic manuscript collection, 1601/19331
- Institute for the History of Technology and Industrial Archaeology Records, 1875/2005, bulk 1980/20056
- J. Davitt McAteer Papers regarding Mining Safety, 1860/2013, bulk 1970/201011
- J.J. Rutledge Technical Writings on Coal Mining, 1920/19392
- James M. Guiher, Jr., Papers, 1835/2014, bulk 1927/19761
- Jefferson Society records, 1825/20185
- John E. Reed Plant Encyclopedic Scrapbooks, 1910/195918
- John E. Winter Papers, 1906/19588
- John Jacob Cornwell (1867-1953), Governor, Papers and Records, 1843/19533
- John Wade Kidwell Family Papers, 1920/2013, bulk 1940/19952
- Joseph W. Summers Papers, 1899/19491
- Justus Collins (1857-1934) Papers, 1887/19622
- Katherine Williams, Collector, Williams Family Papers, 1840/20051
- Louis Watson Chappell (1890-1981), Folklorist, Research Papers, Sound Recordings, and Other Material, 1815/198022
- Lyric Theatre Collection, 1922/2006, bulk 1922/19791