- M.H. Ross, Collector, Papers, 1930/19741
- M.H. Ross, Collector, Papers, 1931/19571
- Marcia Louise Sumner Phillips Journal of an Upshur County Resident regarding the Civil War, 1861/18631
- Marshall County Republican Executive Committee Record Book, 1904/19501
- Martin Baldwin Whitaker Collection, 1967/19681
- Mason-Jackson Labor Council Papers, 1949/19771
- Matthew Mansfield Neely (1874-1958), Politician, Papers, 1900/19541
- Matthew Mansfield Neely (1874-1958), Politician, Scrapbooks, 1900/19241
- Matthew Mansfield Neely (1874-1958), Politician, Scrapbooks, 1913/19321
- Monongalia County Archives, 1863/18691
- Monongalia County Voter Registration, 1934/19441
- Morgantown Municipal Records, 1838/20131