Encyclopedias, Almanacs, Transcripts, and Maps
- Sir Paul Gavrilovitch Vinogradoff
- Sir Pherozeshah Mehta
- Sir Samuel Walker Griffith
- Sir Tej Bahadur Sapru
- Sirens
- Sismondi, Jean-Charles Leonard de
- Sissela Ann Bok
- Sister Juana Inés de la Cruz
- Sister Republics
- Sisters of the Holy Family
- Sit-in Movement of the 1960s
- Situationism
- Sixth Amendment
- Sixties Counterculture: The Hippies and Beyond
- Sixtus V (Pope) (b. 1520, reigned 1585–1590)
- Skaz
- Skene, Philip
- Skenesboro, New York
- Skepticism: Academic and Pyrrhonian
- Skin Color