Encyclopedias, Almanacs, Transcripts, and Maps
- Shrews: Soricidae
- Shrikes
- Shrikes
- Shrikes: Laniidae
- Shrine of Sothis
- Shrine of the Eternal Breath of Tao/ Universal Society of the Integral Way
- Shuja, or Shudja, also known as al-Hasib al-Misri, or Abu Kamil Shuja'ibn Aslam ibn Muhammad ibn Shuja
- Sibley, Ebenezer (1751-1799)
- Sibley, Manoah (1757-1840)
- Sibylline Books
- Sickle Cell Disease
- Siddhas
- Siddhis
- Siderealist (Journal)
- Sideromancy
- Sidgwick, Eleanor Mildred Balfour(1845-1936)
- Sidi Mubarak Bombay
- Sierra, Ralph U(son) (1904-1982)
- Sieur Daniel Greysolon Dulhut
- Sieve of Eratosthenes