- Stanley Adams (1 movie)
- Stan Levitt (1 movie)
- Stan Laurel (1 movie)
- Staff Sergeant John P. Quinlan (1 movie)
- Staff Sergeant Clarence E. Winchell (1 movie)
- Staff Sergeant Cecil H. Scott (1 movie)
- Staff Sergeant Casimer A. Nastal (1 movie)
- Spring Byington (1 movie)
- Spencer Williams (1 movie)
- Spencer Tracy (1 movie)
- Spencer Charters (4 movies)
- Spec O'Donnell (2 movies)
- Spade Cooley (2 movies)
- Sophie Stewart (3 movies)
- Sons of the Pioneers (1 movie)
- Sonny Tufts (1 movie)
- Sonny Ray (1 movie)
- Sonny Chiba (1 movie)
- Sonia Torgeson (1 movie)
- Sol Gorss (1 movie)
- Sôjin (1 movie)
- Sofia Ortega (1 movie)
- Snub Pollard (3 movies)
- Snitz Edwards (1 movie)
- Smoki Whitfield (1 movie)
- Smiley Burnette (3 movies)
- Slim Whitaker (2 movies)
- Slim Summerville (3 movies)
- Slim Harkey (1 movie)
- Slim Andrews (1 movie)
- Slicker the Seal (1 movie)
- Skelton Knaggs (2 movies)
- Silver Tip Baker (2 movies)
- Sigrid Gurie (1 movie)
- Sig Ruman (1 movie)
- Sidney Monckton (1 movie)
- Sidney Miller (2 movies)
- Sidney Marion (1 movie)
- Sidney Easton (1 movie)
- Sidney De Gray (1 movie)
- Sidney Bracey (5 movies)
- Sidney Blackmer (1 movie)
- Sidney Berger (1 movie)
- Si Jenks (1 movie)
- Shorty Rogers (1 movie)
- Shirley Temple (2 movies)
- Shirley O'Hara (2 movies)
- Shirley Jean Rickert (2 movies)
- Shirley Ballard (1 movie)
- Sherry Proctor (1 movie)