N-S
| Title | Director | Cast | Genre | Note |
|---|---|---|---|---|
| The No Mercy Man | Daniel Vance | Sid Haig, Ron Thompson | Action | |
| One Little Indian | Bernard McEveety | James Garner, Pat Hingle | Family, Western | |
| The Outfit | John Flynn | Robert Duvall, Karen Black | Thriller | from Richard Stark novel |
| The Paper Chase | James Bridges | Timothy Bottoms, Lindsay Wagner, John Houseman | Drama | Oscar for Houseman |
| Paper Moon | Peter Bogdanovich | Ryan O'Neal, Tatum O'Neal, Madeline Kahn | Comedy, Drama | Oscar for Tatum O'Neal |
| Papillon | Franklin J. Schaffner | Steve McQueen, Dustin Hoffman | Adventure | story of Henri Charriere |
| Pat Garrett and Billy the Kid | Sam Peckinpah | James Coburn, Kris Kristofferson, Bob Dylan, Slim Pickens, Katy Jurado, Jack Elam, Chill Wills, John Beck, Jason Robards | Western, Biopic | MGM |
| Please Don't Eat My Mother | Carl Monson | Buck Kartalian, Rene Bond | Comedy | |
| Robin Hood | Wolfgang Reitherman | voices of Peter Ustinov, Terry-Thomas | Animated film | |
| SSSSSSS | Bernard L. Kowalski | Strother Martin | Horror | |
| Save the Tiger | John G. Avildsen | Jack Lemmon, Jack Gilford | Drama | Oscar for Lemmon |
| Scarecrow | Jerry Schatzberg | Gene Hackman, Al Pacino | Drama | Cannes Grand Prix award |
| Scorpio | Michael Winner | Burt Lancaster, Alain Delon, Paul Scofield | Thriller | |
| Scream Blacula Scream | Bob Kelljan | William Marshall, Pam Grier | Horror | sequel to Blacula |
| Serpico | Sidney Lumet | Al Pacino, John Randolph, Tony Roberts | Crime, Biopic | based on book by Peter Maas; Golden Globe for Pacino |
| The Seven-Ups | Philip D'Antoni | Roy Scheider, Tony LoBianco | Crime drama | 20th Century Fox |
| Shaft in Africa | John Guillermin | Richard Roundtree | Action, Drama | sequel to Shaft |
| Sisters | Brian De Palma | Margot Kidder, Jennifer Salt | Mystery, Horror | |
| Slaughter's Big Rip-Off | Gordon Douglass | Jim Brown, Ed McMahon, Brock Peters | Blaxploitation | sequel to 1972 film |
| Sleeper | Woody Allen | Woody Allen, Diane Keaton | Comedy, Sci-fi | United Artists |
| Slither | Howard Zieff | James Caan, Sally Kellerman, Peter Boyle | Crime, Comedy | |
| Some Call It Loving | James B. Harris | Zalman King, Richard Pryor | Drama | |
| Soylent Green | Richard Fleischer | Charlton Heston, Leigh Taylor-Young, Edward G. Robinson | Science Fiction | Robinson's final film |
| The Spook Who Sat By the Door | Ivan Dixon | Lawrence Cook | Drama | |
| Steelyard Blues | Alan Myerson | Jane Fonda, Donald Sutherland, Peter Boyle | Comedy | Warner Bros. |
| Sticks and Bones | Robert Downey Sr. | Cliff DeYoung | Drama | |
| The Sting | George Roy Hill | Paul Newman, Robert Redford, Robert Shaw, Eileen Brennan, Ray Walston, Jack Kehoe, Charles Durning, Dana Elcar, Harold Gould, Robert Earl Jones, Dimitra Arliss, Sally Kirkland | Crime, Comedy | won 7 Academy Awards, including Best Picture |
| The Stone Killer | Michael Winner | Charles Bronson, Martin Balsam, Paul Koslo | Crime | |
| Summer Wishes, Winter Dreams | Gilbert Cates | Joanne Woodward, Martin Balsam, Sylvia Sidney | Drama | 2 Oscar nominations |
| Sweet Kill | Curtis Hanson | Tab Hunter, Isabel Jewell, John Aprea | Thriller |
Read more about this topic: List Of American Films Of 1973