Encyclopedias, Almanacs, Transcripts, and Maps
- Securities Exchange Act of 1934
- Sedna
- Seduction
- Seers
- Seghers, Anna (1900–1983)
- Segregation, Racial, Africa
- Sejo
- Sejong
- Selective Draft Cases
- Self-Determination, East Asia and the Pacific
- Self-Strengthening Movements, East Asia and the Pacific
- Selma Ottiliana Lovisa Lagerlöf
- Selma-to-Montgomery, Alabama, Civil Rights Marches
- Semitic Mythology
- Semmelweis, Ignac
- Semprún, Jorge (b. 1923)
- Sen Katayama
- Sendler, Irena
- Senghor, Léopold Sédar (1906–2001)
- Sentencing Reform Act (1984)