N-R
| Title | Director | Cast | Genre | Notes |
|---|---|---|---|---|
| Nit-Witty Kitty | Hanna Barbera | Tom and Jerry | Animation | |
| No Smoking | Jack Kinney | Goofy | Animation | |
| On Moonlight Bay | Roy Del Ruth | Doris Day, Gordon MacRae | Musical | Followed by By the Light of the Silvery Moon |
| On the Riviera | Walter Lang | Danny Kaye, Gene Tierney | Musical | Based on the play The Red Cat. |
| Operation Pacific | George Waggner | John Wayne, Patricia Neal | War | |
| Painting the Clouds with Sunshine | David Butler | Dennis Morgan, Virginia Mayo, Gene Nelson | Musical | Remake of Gold Diggers of 1933. |
| Pandora and the Flying Dutchman | Albert Lewin | Ava Gardner, James Mason | Drama | |
| Payment on Demand | Curtis Bernhardt | Bette Davis, Barry Sullivan | Drama | Originally titled The Story of a Divorce |
| Peking Express | William Dieterle | Joseph Cotten, Corinne Calvet | Adventure | Second remake of Shanghai Express |
| The People Against O'Hara | John Sturges | Spencer Tracy, Pat O'Brien | Film Noir | |
| People Will Talk | Joseph L. Mankiewicz | Cary Grant, Jeanne Crain, Sidney Blackmer, Hume Cronyn, Walter Slezak, Finlay Currie | Romantic Comedy | |
| Pest Man Wins | Jules White | Three Stooges | Comedy | |
| A Place in the Sun | George Stevens | Elizabeth Taylor, Montgomery Clift, Shelley Winters, Raymond Burr, Anne Revere | Drama | based on a book by Theodore Dreiser; won 6 Academy Awards |
| The Prize Pest | Robert McKimson | Looney Tunes | Animation | Final screwball Daffy Duck cartoon |
| The Prowler | Joseph Losey | Van Heflin, Evelyn Keyes | Film Noir | |
| Quebec | George Templeton | John Drew Barrymore, Corinne Calvet | Historical Drama | |
| Quo Vadis | Mervyn LeRoy | Robert Taylor, Deborah Kerr, Peter Ustinov | Historical Epic | 8 Oscar nominations |
| Rabbit Fire | Chuck Jones | Looney Tunes | Animation | |
| The Racket | John Cromwell | Robert Mitchum, Lizabeth Scott | Film Noir | Remake of the 1928 film |
| Rawhide | Henry Hathaway | Tyrone Power, Susan Hayward | Western | |
| The Red Badge of Courage | John Huston | Audie Murphy, Bill Mauldin | War | Based on Stephen Crane novel |
| Rich, Young and Pretty | Norman Taurog | Jane Powell, Wendell Corey, Danielle Darrieux | Musical | |
| The River | Jean Renoir | Nora Swinburne, Esmond Knight | Romance | |
| Roadblock | Harold Daniels | Charles McGraw, Joan Dixon | Film Noir | |
| Royal Wedding | Stanley Donen | Fred Astaire, Jane Powell, Peter Lawford | Musical | Donen's first solo film |
Read more about this topic: List Of American Films Of 1951