Collection
- Institute for the Humanities (University of Michigan) records, 1988-20011
- Institute for the Study of Mental Retardation and Related Disabilities (University of Michigan) records, 1963-19831
- Institute of Science and Technology (University of Michigan) records, 1950-19891
- Inter-Cooperative Council (Ann Arbor, Mich.) records, 1932-20151
- Interfaith Council for Peace and Justice (Ann Arbor, Mich.) records, 1966-20101
- Irwin A. Small papers, 1947-1997 (majority within 1986-1997)1
- J. David Singer papers, 1947-2009 (majority within 1957-2000)1
- Jack Kausch collection, 1927-2002 (majority within 1976-1994)1
- James G. O'Hara papers, 1958-1987 (majority within 1958-1976)1
- James J. Blanchard Papers, 1982-20021
- James K. Pollock papers, 1920-19681
- James Oliver Curwood papers, 1897-19271
- Jane Briggs Hart papers, circa 1925-19961
- Janet Blanchard Papers, 1987-19901
- Jerald F. terHorst papers, 1937-2009 (majority within 1972-2009)1
- John D. Dingell, Jr. papers, 1922-2017 (majority within 1955-2014)1
- John Engler Papers, 1968-20031
- John W. Aldridge papers, 1943-2007 (majority within 1950-2000)1
- Joseph Ralston Hayden Papers, 1854-19751
- Joyce Lindeman papers, 1950-1997 (majority within 1955-1986)1