Creator
- Smith, Ethel M.1
- Smith, Leonard O.1
- Smith, Nellie M.1
- Smith, Travis L., III1
- Socialist Publication Society1
- Socialist Workers' Party1
- Solarcon1
- Solomons, Selina1
- Sonakshee, Shree1
- Sosa, Alberto1
- Soule, Winsor1
- South-Side Welfare Rights Organization1
- Speer, Ocie1
- Spell, W. H., Jr.1
- Spencer, Anna G.1
- Squire, John Collings, Sir1
- Stagg, John1
- Stark, John1
- Starr, James H.1
- Steinhoff, Judith1