Encyclopedias, Almanacs, Transcripts, and Maps
- Sobeloff, Simon E. (1894–1973)
- Social Compact Theory
- Social Science in Constitutional Litigation
- Social Science Research and Constitutional Law
- Social Security Act 49 Stat. 620 (1935)
- Soldier and Biological Chemical Command (SBCCOM), United States Army
- Solem v. Helm 463 U.S. 277 (1983)
- Solicitor General
- Solicitor General (Update)
- Solid-Phase Microextraction Techniques
- Somerset's Case 98 Eng. Rep. 499 (K.B., 1772)
- Sonzinsky v. United States 300 U.S. 506 (1937)
- Sosna v. Iowa 419 U.S. 393 (1975)
- SOSUS (Sound Surveillance System)
- Soundtrucks and Amplifiers
- Souter, David H. (1939–)
- Souter, David H. (1939–) (Update)
- South Africa, Intelligence and Security
- South Carolina Ordinance of Nullification (1832)
- South Carolina Ordinance of Secession (1860)