Collection
- Arthur J. Tuttle Papers, 1849-1958 (majority within 1888-1944)13
- Austin Blair Family Papers, 1849-1981 (majority within 1895-1920)13
- Birney-McClear-Hankerd family papers, 1835-197213
- Brownell family papers, 1823-1969 (majority within 1850-1940)13
- Charles Horton Cooley papers, 1872-193013
- Delta Sigma Delta records, 1882-2021 (majority within 1882-1982)13
- Grand Army of the Republic. Billy Cruson Post No. 347 (Breckenridge, Mich.) Organizational records, 1892-1919, and undated13
- Harold Dunbar Corbusier papers, 1883-1979 (scattered dates) (majority within 1900-1902)13
- Horace L. Wilgus Papers, 1878-193513
- Jacob D. Brook papers, 1886-195413
- Milan Area Historical Society collection, 1833-201713
- Palmer Family (Pontiac, Mich.) papers, circa 1814-194013
- Pattengill Family papers, 1767-196313
- Satakunta Region immigrant letters, 1880-196413
- Stearns Salt and Lumber Company Records, 1881-192313
- Susan Wineberg cookbook collection, 1925-2007 (majority within 1920s-1940s)13
- William B. Mershon Papers, 1848-194313
- Zion Lutheran Church (Ann Arbor, Mich.) records, 1833-198113
- Ann Arbor (Mich.) records, 1830-200212
- Daughters of the American Revolution of Michigan records, 1893-201412