News Wires, White Papers, and Books
- Siebert, Charles 1938– (Charlie Siebert; Charles Siebert, II)
- Siegel, Charles
- Siegel, Joel 1943-2007 (Joel Steven Siegel)
- Siemaszko, Casey 1961-
- Siemaszko, Nina 1970–
- Sigel, Beanie
- Sigel, Newton Thomas 1960–
- Sigismondi, Barry
- Sigler, Jamie-Lynn 1981–
- Significant Figures or Digits
- Sigur Rós
- Sigur, Wanda Anne Alexander 1958–
- Siji
- Sikes, Cynthia 1954–
- Sikking, James B. 1934- (James Sikking, Jim Sikking)
- Silas, Paul 1943–
- Silent Snow, Secret Snow
- Siliotto, Carlo 1950-
- Silk, Garnett
- Sill, Judee