Collection
- Marjorie A. Blackistone and Horace Ferguson Bradfield papers, 1931-19781
- Martin Pakledinaz collection, 1971-1978 (majority within 1975-1976)1
- Maury family papers, 1782-1979 (majority within 1820-1872)1
- Men's Glee Club (University of Michigan) Records, 1886-20121
- Michael Ranville papers, 1953-20081
- Michelle Krebs papers, 1984-20091
- Michigan Abortion Referendum Committee Records, 1969-19721
- Michigan Daily records, 1950-20061
- Michigan Environmental Council records, 1925-2012 (majority within 1980-2005)1
- Michigan Peaceworks records, 2001-20111
- Michigan Roundtable for Diversity and Inclusion records, 1941-20111
- Middle English Dictionary records, 1925-20081
- Migrant Health Promotion records, 1982-20121
- Mike Wallace CBS 60 Minutes papers, 1922-2007 (majority within 1968-2007)1
- Milan Area Historical Society collection, 1833-20171
- Morton S. Hilbert papers, 1943-19991
- Nomads records, 1965-20111
- Office of Research (University of Michigan) records, 1911-2013 (majority within 1950-2010)1
- Paul G. Kauper papers, 1925-19741
- Peter Sparling papers, 1961-2013 (majority within 1970-2000)1