Collection
- William Herbert Hobbs papers, 1880-1955 (majority within 1905-1951)11
- Arnold Transit Company records, 1854-1987 (majority within 1900-1970)10
- Birney-McClear-Hankerd family papers, 1835-197210
- Blodgett Family papers, 1872-1953 (majority within 1884-1934)10
- Bureau of School Services (University of Michigan) records, 1871-199210
- Campbell family papers, 1860-1865, 1879-194910
- Charles F. Ruggles Business Records, 1856-1941, and undated10
- Chase S. Osborn Papers, circa 1870-1949 (majority within 1889-1949)10
- Don Binkowski collected materials, 1825-201310
- Douglass family (Detroit and Ann Arbor, Mich.) papers, 1812-1911 (majority within 1837-1900)10
- Dwight-Willard-Alden-Allen-Freeman family papers, 1752-193710
- Gerrit S. Ward Family Papers, 1820, 1965, and undated10
- Gilchrist Family Papers, 1867-194510
- Helen Belfield Bates Van Tyne Papers, 1846-1971 (majority within 1950-1966)10
- Hinsdale family papers, 1857-196310
- Houck, Kibler, and Smith families papers, 1853-2012 (majority within 1910-1946)10
- Kelsey Museum of Archaeology records, 1890-200110
- Michigan Mining Industries Collection, 1845-199010
- Michigan Woman's Christian Temperance Union records, 1874-200610
- Millard D. Olds Papers, 1855-2000, and undated10