Collection
- Rudolph E. Reichert Papers, 1907-2004 (majority within 1907-1962)1
- Rup Chand papers, 1930-19941
- Russell A. Dodge photograph collection, 1926, 1920s, undated1
- S. Vern Taylor papers, 1833, circa 1860-19141
- Sam Breck photograph collection, 1950s-1990s1
- Samuel James Eldersveld papers, 1938-20101
- Sarah Caswell Angell papers, 1746-1903 (majority within 1855-1903)1
- School for Environment and Sustainability (University of Michigan) records, 1903 - 20121
- Shepard family papers, 1807-19341
- Shirley Wheeler Smith Papers, 1881-19591
- Social Justice in Michigan Web Archive, 2010-20141
- Squier Family papers, 1843-19771
- St. Clare of Assisi Episcopal Church, Ann Arbor, Mich., Records, 1953-19911
- Stewart Henry Burnham photograph collection, 1899-19091
- Stuart Hoffman Perry papers, 1874-19661
- Summit Medical Center records, 1969-2003 (majority within 1970-1985)1
- Theophil Henry Hildebrandt Papers, 1887-1978 (majority within 1930-1960)1
- Thomas M. Cooley Papers, 1850-18981
- Thomas Mitchell Sawyer papers, 1951-19881
- Tinkham family papers, 1875-19631