- Lawton, Joseph James, 1861-19411
- Lay, Herman Warden, 1909-19821
- Lee, Robert Greene, 1886-19781
- Legislators United States1
- Lemmond, Sam Franklin, 1906-19941
- Lemond, Grady Franklin, 1917-20001
- Library services--South Carolina1
- Ligon, R. B.--Correspondence1
- Lipscomb, Virgil Wood, 1886-19811
- Livestock1
- Lutheran Church--South Carolina--Congresses1
- Lynch, Harry Fred, 1916-19821
- MacFarland, Robert Alfred, 1876-19601
- Mahon, G. Heyward, 1889-19621
- Manly, Basil, 1798-18681
- Manly, Basil, 1825-18921
- Mann, James R. (James Robert), 1920-2010.1
- Marney, Carlyle, 1916-19781
- Marshall, II, Stanmore Brooks, 1886-19391
- Martinie, A.-H. (A.-Henri), 1881-1