| Title |
Director |
Cast |
Genre |
Notes |
| King of the Rocket Men | Fred C. Brannon | Tris Coffin, Mae Clarke | Serial | |
| A Kiss in the Dark | Delmer Daves | Jane Wyman, David Niven | Comedy | Warner Bros. |
| Knock on Any Door | Nicholas Ray | Humphrey Bogart, John Derek, George Macready | Drama | Columbia; from Willard Motley novel |
| The Lady Takes a Sailor | Michael Curtiz | Jane Wyman, Dennis Morgan | Comedy | Warner Bros. |
| The Last Bandit | Joseph Kane | Bill Elliott, Lorna Gray | Western | |
| A Letter to Three Wives | Joseph L. Mankiewicz | Linda Darnell, Ann Sothern, Jeanne Crain, Paul Douglas, Kirk Douglas, Jeffrey Lynn, Thelma Ritter | Drama | Fox; won 2 Academy Awards |
| Little Women | Mervyn LeRoy | Elizabeth Taylor, Margaret O'Brien, June Allyson, Mary Astor, Janet Leigh | Family | MGM; from Louisa May Alcott novel |
| Long-Haired Hare | | Bugs Bunny | Animated | |
| Look for the Silver Lining | David Butler | June Haver, Ray Bolger | Musical | Warner Bros. |
| Lost Boundaries | Alfred L. Werker | Beatrice Pearson, Mel Ferrer | Drama | |
| Love Happy | David Miller | Marx Brothers, Vera-Ellen, Ilona Massey, Marion Hutton, Raymond Burr | Comedy | United Artists; final Marx Bros. film |
| Love That Pup | | Tom and Jerry | Animated | |
| The Lucky Stiff | Lewis R. Foster | Dorothy Lamour, Claire Trevor | Comedy | U.A.; produced by Jack Benny |
| Lust for Gold | S. Sylvan Simon | Glenn Ford, Ida Lupino, Gig Young | Western | Columbia |
| Ma and Pa Kettle | Charles Lamont | Marjorie Main, Percy Kilbride | Comedy | The Egg and I sequel |
| Madame Bovary | Vincente Minnelli | Jennifer Jones, James Mason, Van Heflin | Drama | from Gustave Flaubert novel |
| Malaya | Richard Thorpe | Spencer Tracy, James Stewart, Sydney Greenstreet | Drama | MGM |
| Malice in the Palace | Jules White | Three Stooges | Slapstick | |
| Manhandled | Lewis R. Foster | Dorothy Lamour, Dan Duryea, Sterling Hayden | Film noir | Paramount |
| Mighty Joe Young | Ernest B. Schoedsack | Terry Moore, Robert Armstrong, Ben Johnson | Adventure | RKO; remade in 1998 |
| Miss Grant Takes Richmond | Lloyd Bacon | Lucille Ball, William Holden | Comedy | Columbia |
| Mississippi Hare | | Bugs Bunny | Animated | |
| Miss Mink of 1949 | Glenn Tryon | Lois Collier | Comedy | 20th Century Fox |
| Mother Is a Freshman | Lloyd Bacon | Loretta Young, Van Johnson, Rudy Vallée | Romantic comedy | 20th Century Fox |
| Mr. Belvedere Goes to College | Elliott Nugent | Clifton Webb, Shirley Temple | Comedy | 20th Century Fox; sequel to Sitting Pretty |
| Mr. Soft Touch | Gordon Douglas | Glenn Ford, Evelyn Keyes | Crime | |
| My Dream Is Yours | Michael Curtiz | Doris Day, Jack Carson | Musical | Warner Bros. |
| My Foolish Heart | Mark Robson | Susan Hayward, Dana Andrews | Drama | 2 Oscar nominations |
| My Friend Irma | George Marshall | Dean Martin, Jerry Lewis | Comedy | Paramount; 1st Martin and Lewis film |
| Neptune's Daughter | Edward Buzzell | Esther Williams, Red Skelton, Ricardo Montalbán | Musical | MGM; Oscar for Best Song |
| Never Fear | Ida Lupino | Sally Forrest, Hugh O'Brian | Drama | Eagle-Lion |
| Night Unto Night | Don Siegel | Ronald Reagan, Viveca Lindfors, Broderick Crawford | Drama | Warner Bros. |
| Oh, You Beautiful Doll | John M. Stahl | Mark Stevens, June Haver, Gale Robbins | Musical | 20th Century Fox |
| On the Town | Stanley Donen, Gene Kelly | Gene Kelly, Frank Sinatra, Ann Miller, Betty Garrett | Musical | MGM; Oscar for Best Musical Score |
| Pinky | Elia Kazan | Jeanne Crain, Ethel Barrymore, Ethel Waters | Drama | 3 Oscar nominations |
| Porky in Wackyland | | Porky Pig | Animated | |
| Port of New York | László Benedek | Scott Brady, Richard Rober, Yul Brynner | Drama | Brynner's first film |
| Prince of Foxes | Henry King | Tyrone Power, Orson Welles | Drama | 20th Century Fox |
| Rabbit Hood | | Bugs Bunny | Animated | |
| Radar Patrol vs Spy King | | Kirk Alyn | Serial | |
| Rebel Rabbit | | Bugs Bunny | Animated | |
| The Reckless Moment | Max Ophüls | James Mason, Joan Bennett, Geraldine Brooks | Drama | Columbia |
| The Red Danube | George Sidney | Peter Lawford, Janet Leigh, Angela Lansbury | Drama | MGM |
| Red, Hot and Blue | John Farrow | Betty Hutton, Victor Mature, William Demarest | Musical comedy | Paramount |
| Red Light | Roy Del Ruth | George Raft, Virginia Mayo, Raymond Burr | Crime drama | United Artists |
| The Red Pony | Lewis Milestone | Myrna Loy, Robert Mitchum, Louis Calhern | Drama | Republic; written by John Steinbeck |
| Reign of Terror | Anthony Mann | Robert Cummings, Arlene Dahl | Suspense | Eagle-Lion |
| Rope of Sand | William Dieterle | Burt Lancaster, Paul Henreid, Claude Rains | Adventure | Paramount |
| Roseanna McCoy | Irving Reis | Farley Granger, Joan Evans | Drama | RKO |
| Rustlers | Lesley Selander | Tim Holt, Richard Martin, Martha Hyer | Western | RKO |