Collection
- Robert D. Aldrich Collection, 1783-198311
- Sligh Family Papers, 1842-201211
- Stacy Family Papers, 1830-1915, and undated11
- Washtenaw County Historical Society records, 1827-201411
- Arthur J. Tuttle Papers, 1849-1958 (majority within 1888-1944)10
- Blodgett Family papers, 1872-1953 (majority within 1884-1934)10
- Charles F. Ruggles Business Records, 1856-1941, and undated10
- Coe (Mich. : Township) Township Records, 1859-1901, and undated10
- Delta Sigma Delta records, 1882-2021 (majority within 1882-1982)10
- Don Binkowski collected materials, 1825-201310
- Dwight-Willard-Alden-Allen-Freeman family papers, 1752-193710
- Gerrit S. Ward Family Papers, 1820, 1965, and undated10
- Houck, Kibler, and Smith families papers, 1853-2012 (majority within 1910-1946)10
- Johan G.R. Banér papers, 1890-193810
- Manuscript Recipe Book collection, 1793-1959 (majority within 19th century)10
- Michigan Woman's Christian Temperance Union records, 1874-200610
- Nottawa (Isabella County, Mich. : Township) Township records, 1865-2001, and undated10
- Pattengill Family papers, 1767-196310
- Salling, Hanson, and Company records, 1881-192810
- Wells Family Papers, 1823-194610