Collection
- Carl Rominger family papers, 1840-19451
- Carlton F. Wells papers, 1910-19941
- Catherine Kemmering collection, 1976-1988, 19951
- Charles A. Hill Family Papers, 1917-1981 (majority within 1939-1970)1
- Charles Adam Weissert papers, 1893-19471
- Charles E. Potter Papers, 1947-19581
- Charles M. Ziegler papers, 1928-19591
- Charles Moore papers, 1901-19401
- Charles Rasch Collection, 1890-2011 (majority within 1953-2005)1
- Charles Thomas Jr. Papers, 1965-1994 (majority within 1968-1980)1
- Charles William Ungermann papers, 1915-19671
- Chase S. Osborn Papers, circa 1870-1949 (majority within 1889-1949)1
- Chauncey E. Spencer Papers, 1914-20061
- Children's Fund of Michigan, records, 1929-1965 (majority within 1929-1961)1
- Chrystal G. Tibbs papers, circa 1890-2015 (majority within 1960-2013)1
- Church Women United In Michigan records, 1929-20111
- Church Women United in Chelsea records, 1961-19921
- Clara Hadley Wait papers, 1893-2001 (majority within 1893-1919)1
- Clara Marian Wheeler papers, 1874-19481
- Cleland B. Wyllie papers, 1926-19791