- Klein, Madeline1
- Knights of Honor of South Carolina, Grand Lodge1
- Knox, Thomas P.1
- Kohn, August, 1868-19301
- Kosciuszko Foundation1
- LaBorde, Maximilian1
- Ladies Relief Association (Spartanburg, S.C.)1
- Ladies' Association to Commemorate the Confederate Dead1
- Ladies' Calhoun Monument Association1
- Ladies' Society in aid of the Suffering and Destitute Poor of the South1
- Ladies' Volunteer Aid Association (Camden, S.C.)1
- Ladies’ Auxiliary of Stuyvesant Polyclinic Charity Musicale1
- Lambert Pharmaceutical Company1
- Landrum, Abner1
- Landrum, John G.1
- Lane Manufacturing Company1
- Lanneau, Bazile1
- Laughlin, Alexander1
- Laurens, Henry1
- Lavalle, Paul1