- Martha Elizabeth Cunningham Monteith Collection 1
- Martha Mondschein Bauer Papers, 1940-200111
- Martha Puckmire letters of guardianship and apprentices' indenture, 18522
- Marx E. Cohen Plantation Records, 1840-18683
- Mary Lamboll Thomas Beach Papers, 1822-189018
- Mary Motte Alston Pringle Receipt Book155
- Massenet First Edition Opera Scores8
- Master Plan Report 1940, Cheraw Recreational Demonstration Area3
- Materials towards a history of the Baptists in the provinces of Maryland, Virginia, North Carolina, South Carolina, Georgia1
- Mathurin Guerin Gibbs Plantation Register, 1824-18751
- Matthew J. & Arlyn Bruccoli Collection of F. Scott Fitzgerald1
- Mattoon Presbyterian Church6
- Mattoon Presbyterian Church 53
- Maxcy Gregg Papers, 1835-1888.39
- Maynard Pearlstine Travel Albums and Sketches, 1936-200624
- Mayors of Columbia35
- Mazyckborough-Wraggborough Photograph Survey37
- McBee Sons & Company Store Ledger Book, 1846-1861508
- McColl High School Yearbooks19
- McKinnon Pastoral Record Book1