The 1955 Academy Awards were presented March 21, 1956 at the RKO Pantages Theatre, Hollywood, Calif and the NBC Century Theatre, New York, N.Y.
| Best Motion Picture | Love Is a Many Splendored Thing, Buddy Adler, producer (Twentieth Century-Fox) |
| Marty, Harold Hecht, producer (United Artists) |
| Mister Roberts, Leland Hayward, producer (Warner Bros.) |
| Picnic, Fred Kohlmar, producer (Columbia) |
| The Rose Tattoo, Hal Wallis, producer (Paramount) |
| Best Actor | Ernest Borgnine, Marty |
| James Cagney, Love Me or Leave Me |
| James Dean, East of Eden |
| Frank Sinatra, The Man With the Golden Arm |
| Spencer Tracy, Bad Day at Black Rock |
| Best Actress | Susan Hayward, I'll Cry Tomorrow |
| Katharine Hepburn, Summertime |
| Jennifer Jones, Love Is a Many Splendored Thing |
| Anna Magnani, The Rose Tattoo |
| Eleanor Parker, Interrupted Melody |
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 Anna Magnani, The Rose Tattoo Archive Photos |
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| Actor in a Supporting Role | Arthur Kennedy, Trial |
| Jack Lemmon, Mister Roberts |
| Joe Mantell, Marty |
| Sal Mineo, Rebel Without a Cause |
| Arthur O'Connell, Picnic |
| Actress in a Supporting Role | Betsy Blair, Marty |
| Jo Van Fleet, East of Eden |
| Peggy Lee, Pete Kelly's Blues |
| Marisa Pavan, The Rose Tattoo |
| Natalie Wood, Rebel Without a Cause |
| Directing | Elia Kazan, East of Eden |
| David Lean, Summertime |
| Joshua Logan, Picnic |
| Delbert Mann, Marty |
| John Sturges, Bad Day at Black Rock |
| Writing | | Motion Picture Story | Joe Connelly and Bob Mosher, The Private War of Major Benson | | Daniel Fuchs, Love Me or Leave Me | | Beirne Lay, Jr., Strategic Air Command | | Jean Marsan, Henry Troyat, Jacques Perret, Henri Verneuil and Raoul Ploquin, The Sheep Has Five Legs | | Nicholas Ray, Rebel Without a Cause | | Screenplay | Richard Brooks, Blackboard Jungle | | Paddy Chayefsky, Marty | | Daniel Fuchs and Isobel Lennart, Love Me or Leave Me | | Millard Kaufman, Bad Day at Black Rock | | Paul Osborn, East of Eden | | Story and Screenplay | Betty Comden and Adolph Green, It's Always Fair Weather | | William Ludwig and Sonya Levien, Interrupted Melody | | Melville Shavelson and Jack Rose, The Seven Little Foys | | Milton Sperling and Emmet Lavery, The Court-Martial of Billy Mitchell | | Jacques Tati and Henri Marquet, Mr. Hulot's Holiday |
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| Cinematography | | Black-and-White | Arthur E. Arling, I'll Cry Tomorrow | | Russell Harlan, Blackboard Jungle | | James Wong Howe, The Rose Tattoo | | Charles Lang, Queen Bee | | Joseph LaShelle, Marty | | Color | Robert Burks, To Catch a Thief | | Harold Lipstein, A Man Called Peter | | Leon Shamroy, Love Is a Many Splendored Thing | | Harry Stradling, Guys and Dolls | | Robert Surtees, Oklahoma! |
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| Art Direction | | Black-and-White | Cedric Gibbons and Malcolm Brown, art direction; Edwin B. Willis and Hugh B. Hunt, set decoration, I'll Cry Tomorrow | | Cedric Gibbons and Randall Duell, art direction; Edwin B. Willis and Henry Grace, set decoration, Blackboard Jungle | | Edward S. Haworth and Walter Simonds, art direction; Robert Priestley, set decoration, Marty | | Hal Pereira and Tambi Larsen, art direction; Sam Comer and Arthur Krams, set decoration, The Rose Tattoo | | Joseph C. Wright, art direction; Darrell Silvera, set decoration, The Man With the Golden Arm | | Color | William Flannery and Jo Mielziner, art direction; Robert Priestley, set decoration, Picnic | | Hal Pereira and Joseph McMillan Johnson, art direction; Sam Comer and Arthur Krams, set decoration, To Catch a Thief | | Oliver Smith and Joseph C. Wright, art direction; Howard Bristol, set decoration, Guys and Dolls | | Lyle Wheeler and George W. Davis, art direction; Walter M. Scott and Jack Stubbs, set decoration, Love Is a Many Splendored Thing | | Lyle Wheeler and John DeCuir, art direction; Walter M. Scott and Paul S. Fox, set decoration, Daddy Long Legs |
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| Sound Recording | MGM Studio Sound Dept., Love Me or Leave Me |
| RCA Sound Department, Not as a Stranger |
| Todd-AO Sound Department, Oklahoma! |
| Twentieth Century-Fox Studio Sound Dept., Love Is a Many Splendored Thing |
| Warner Bros. Studio Sound Dept., Mister Roberts |
| Music | | Song | “I'll Never Stop Loving You,” Love Me or Leave Me, Nicholas Brodszky, music; Sammy Cahn, lyrics | | “Love Is a Many Splendored Thing,” Love Is a Many Splendored Thing, Sammy Fain, music; Paul Francis Webster, lyrics | | “Something's Gotta Give,” Daddy Long Legs, Johnny Mercer, music and lyrics | | (Love Is) “The Tender Trap,” The Tender Trap, James Van Heusen, music; Sammy Cahn, lyrics | | “Unchained Melody,” Unchained, Alex North, music; Hy Zaret, lyrics | | Scoring of a Dramatic or Comedy Picture | Elmer Bernstein, The Man With the Golden Arm | | George Duning, Picnic | | Alfred Newman, Love Is a Many Splendored Thing | | Alex North, The Rose Tattoo | | Max Steiner, Battle Cry | | Scoring of a Musical Picture | Robert Russell Bennett, Jay Blackton and Adolph Deutsch, Oklahoma! | | Jay Blackton and Cyril J. Mockridge, Guys and Dolls | | Percy Faith and George Stoll, Love Me or Leave Me | | Alfred Newman, Daddy Long Legs | | André Previn, It's Always Fair Weather |
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| Film Editing | Warren Low, The Rose Tattoo |
| Alma Macrorie, The Bridges at Toko-Ri |
| Charles Nelson and William A. Lyon, Picnic |
| Gene Ruggiero and George Boemler, Oklahoma! |
| Ferris Webster, Blackboard Jungle |
| Costume Design | | Black-and-White | Beatrice Dawson, The Pickwick Papers | | Edith Head, The Rose Tattoo | | Tadaoto Kainoscho, Ugetsu | | Jean Louis, Queen Bee | | Helen Rose, I'll Cry Tomorrow | | Color | Edith Head, To Catch a Thief | | Charles LeMaire, Love Is a Many Splendored Thing | | Charles LeMaire and Mary Wills, The Virgin Queen | | Helen Rose, Interrupted Melody | | Irene Sharaff, Guys and Dolls |
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| Special Effects | The Bridges at Toko-Ri (Paramount) |
| The Dam Busters (Warner Bros.) |
| The Rains of Ranchipur (Twentieth Century-Fox) |
| Short Subjects | | Cartoon | Good Will to Men (MGM Cartoon Series) (Frederick Quimby, William Hanna and Joseph Barbera, producers; MGM) | | The Legend of Rock-a-Bye Point (Walter Lantz Productions; Universal-International) | | No Hunting (Donald Duck Series) (Walt Disney Productions; RKO Radio) | | Speedy Gonzales (Merrie Melodies Series) (Warner Bros. Cartoons, Inc.; Warner Bros.) | | One-Reel | Gadgets Galore (Warner Varieties Series) (Robert Youngson, producer; Warner Bros.) | | Survival City (Movietone CinemaScope Series) (Edmund Reek, producer; Twentieth Century-Fox) | | 3rd Ave. El (Carson Davidson Productions; Ardee Films) | | Three Kisses (Topper Special Series) (Justin Herman, producer; Paramount) | | Two-Reel | The Battle of Gettysburg (Dore Schary, producer; MGM) | | The Face of Lincoln (University of Southern California Presentation; Cavalcade Pictures, Inc.) | | On The Twelfth Day…(United Kingdom Series) (Go Pictures, Inc.; George Brest and Associates) | | Switzerland (People and Places Series) (Walt Disney Productions; Buena Vista) | | 24-Hour Alert (Cedric Francis, producer; Warner Bros.) |
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| Documentary | | Short Subject | The Battle of Gettysburg (Dore Schary, producer; MGM) | | The Face of Lincoln (University of Southern California Presentation; Cavalcade Pictures, Inc.) | | Men Against the Arctic (People and Places Series) (Walt Disney Productions; Buena Vista) | | Feature | Heartbreak Ridge (Rene Risacher Production; Tudor Pictures) | | Helen Keller in Her Story (Nancy Hamilton, producer; Nancy Hamilton Presentation) |
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| Honorary Award | To Samurai, The Legend of Musashi (Japan), best foreign language film first released in the United States during 1955 |
