|A Double Life (1947) [Pat Kroll]: Strangled by Ronald Colman in her bedroom. Her body is shown again later on when the police investigate.
Larceny (1948) [Tory]: Shot to death by John Payne as she embraces him. (Thanks to Alan)
The Great Gatsby (1949) [Myrtle Wilson]: Hit by a car driven by Betty Field. (I haven't seen this version, but I'm familiar with the story.)
A Place in the Sun (1951) [Alice Tripp]: Accidentally drowned when the boat capsizes while she's out on a lake with Montgomery Clift. (He had been planning to kill her, but hadn't decided whether on not to go through with it when fate took the decision out of his hands.) It's been so long since I've seen this movie, I can't recall whether her body was actually shown or not.
Phone Call from a Stranger (1952) [Binky Gay a.k.a. Bianca Carr]: Killed in a plane crash, along with Michael Rennie and Keenan Wynn. (Thanks to Bill)
Mambo (1954) [Toni Salerno]: Hit by a car while running through a parking garage. (Thanks to Alan)
The Big Knife (1955) [Dixie Evans]: Hit by a bus (off-screen); we learn of her death afterwards when Wendell Corey informs Ida Lupino. (Thanks to Alan)
The Night of the Hunter (1955) [Willa Harper]: Throat slit (off-screen) by Robert Mitchum. Her body is shown sitting in the car at the bottom of the river afterwards.
The Diary of Anne Frank (1959) [Mrs. Petronella Van Daan]: Dies (off-screen) in a concentration camp; her death is confirmed in an epilogue scene of Joseph Schildkraut discussing the deaths of all his friends. (Thanks to Alan)
Lolita (1962) [Charlotte Haze]: Hit by a car (off-screen). Her body is shown lying in the street (covered with a sheet) afterwards.
The Mad Room (1969) [Mrs. Armstrong]: Hacked to death (off-screen) with a saber by Stella Stevens; her body is shown afterwards when Stella 'discovers' her. (Thanks to Bill)
Bloody Mama (1970) [Kate 'Ma' Barker]: Shot to death in a shoot-out with the FBI. Shown as a series of black & white still frames.
Whoever Slew Auntie Roo? (Who Slew Auntie Roo?) (1971) [Rosie 'Aunt Roo' Forrest]: Burned to death after Mark Lester starts a fire in the kitchen while she's trapped in the pantry.
Adventures of Nick Carter (1972) [Bess Tucker]: Killed (though I don't know how or by whom). (Thanks to Alan)
The Poseidon Adventure (1972) [Belle Rosen]: Dies of a heart attack after rescuing Gene Hackman from being trapped underwater.
Shattered (Something to Hide) (1972) [Gabriella Field]: Throat accidentally slashed (off-screen) when she falls onto a broken bottle during a fight with Peter Finch. Her body is never shown; we only hear about her death afterwards when Peter confesses to Linda Hayden. (Thanks to Bill)
Cleopatra Jones (1973) [Mommy]: Falls off of a walkway during a fight with Tamara Dobson.
An Average Little Man (Un Borghese piccolo piccolo; A Very Little Man) (1977) [Amalia Vivaldi]: Dies of a heart attack. (Thanks to Giulia)
The Initiation of Sarah (1978) [Mrs. Erica Hunter]: Burned to death after Kay Lenz uses her telekinetic powers to set the sorority house terrace on fire. (Thanks to Eugene)
City on Fire (1979) [Nurse Andrea Harper]: Hit by falling rubble while the burning hospital is being evacuated. (Thanks to Johan)
Elvis (1979) [Gladys Presley]: Dies of a heart attack. (I haven't seen this, but I know that her death occurred during the timeframe covered by the movie.) (Thanks to Alan)
Looping (Looping: Der lange Traum von kurzen Gluck) (1981) [Carmen]: Shot in the head (though I don't know by whom). (Thanks to Alan)
Heavy (1995) [Dolly Medina]: Dies (off-screen) of natural causes; we only learn about her death afterwards when Liv Tyler finds Pruitt Taylor Vince standing at her grave.
Raging Angels (1995) [Grandma Ruth]: Falls down a flight of stairs while running away from a demon. (Thanks to Alan)