- Lyric Theatre Collection, 1922/2006, bulk 1922/19791
- Martin Judy Family Papers, 1857/2012, bulk 1890/19861
- Mary McKendree Johnson, Collector, Papers, 1932/195811
- Matthew Mansfield Neely (1874-1958), Politician, Papers, 1900/19545
- Melvin C. Snyder, Congressman, Papers, 1946/19534
- Metropolitan Theatre, Morgantown, Records, 1910/200027
- Monongalia County (W. Va.) Court Records and Miscellaneous Papers, 1774/19542
- Monongalia County Historical Records, 1792/1982, bulk 1878/197629
- Morgantown Municipal Records, 1838/20131
- Morgantown Post Office Scrapbook and Other Records, 1907/19781
- Ohio County (W. Va.) Court Records and Miscellaneous Papers, 1772/1954, bulk 1777/19301
- Ollen Lawrence Burnette, Jr. papers, 1815/20141
- Preston County (W. Va.) Court Record Books, 1818/19452
- Ronald Lewis, Historian, Papers, 1850/2021, bulk 1970/202110
- Siler Family Papers, 1848/196844