- J. Calvitt Clarke Jr. Papers, 1954/19991
- J. Davitt McAteer Papers regarding Mining Safety, 1860/2013, bulk 1970/2010253
- J. Douglas Smith Papers, 1959/1993, bulk 1975/19901
- J. Edward Grimsley certificates, 1951/19902
- J. Hoge Tyler Diary, 1846/2009, bulk 1846/19251
- J. Kenneth Graham Collection, 1934/1986, bulk 1975/19852
- J. Montgomery Curtis, Journalist, Papers, 1891/19922
- J. Paul Hudson Papers, 1930/19981
- J. Paxton Marshall Papers, 1967/19962
- J. Randolph Ruffin Papers, 1956/19935
- J. Robert Rice, Collector, Civil War Diary of Joshua Rice, 1857/2018, bulk 1857/18811
- J. Smith Ferebee collection, 1923/19901
- JMU Athletics posters, 1976/2000, bulk 1990/20005
- Jack Censer collection, 1953/2011, bulk 201146
- Jack Eric Morpurgo Papers, 1937/2000, bulk 1950/19706