Susan Jane Berman (May 18, 1945 – December 23, 2000) was an American journalist and author. The daughter of mobster David Berman, she wrote about her eventual realization of her father's role in organized crime. In 2000, Berman was found murdered in her home. The case went unsolved for more than a decade, until real-estate heir Robert Durst, Berman's longtime friend, was charged with her murder in 2015 and convicted in 2021.

Susan Berman was born in Minneapolis, Minnesota, in 1945, the only child of the former Betty Ewald, a traveling dancer who had adopted the stage name Gladys Evans, and David "Davie" Berman. Berman always maintained that her father—a major Jewish-American organized crime figure who took over the Flamingo Hotel after Bugsy Siegel's 1947 gangland murder—died under mysterious circumstances on an operating table when she was 12, but all indications are that he died of a heart attack during surgery. She also believed uncertainty surrounded her mother's presumed suicide by overdose a year later.

Berman grew up in Las Vegas and, later, in Hollywood, California, where her classmates and friends at the Chadwick School included Jann Wenner and Liza Minnelli. Berman received a Bachelor of Arts degree in 1967 from the University of California, Los Angeles, where she met American real estate heir Robert Durst. In 1969, she graduated with a Master of Arts in journalism from the University of California, Berkeley. Berman was gradually paid a total of $4.3 million by the Mafia for her father's interests in casinos and other properties.

Berman was a novelist and author of two memoirs, along with a 1971 college guidebook, The Underground Guide to the College of Your Choice. Her first memoir, Easy Street, detailed her life as a mobster's daughter. While representing her in the 1970s, the William Morris Agency talked with several Hollywood producers interested in adapting the book into a screenplay. The movie rights were ultimately sold for $350,000, but no film project ever materialized. For a time, Berman attempted to finance a musical based on the Dreyfus affair, in which Durst declined to invest.

In San Francisco, Berman wrote for media outlets including the San Francisco Examiner, Francis Ford Coppola's City Magazine, the Westinghouse Evening Show on KPIX-TV, and the People show on CBS. She was a contributing writer for magazines such as New York, Cosmopolitan and Family Circle. She also wrote Driver, Give a Soldier a Lift! and Lady Las Vegas, accompanying the 1996 release of an A&E documentary, for which she was a co-writer and nominated for a Writers Guild of America award.

At the time of her death, Berman was working on a project for Showtime with attorney Kevin Norte. Entitled Sin City, it was being planned as Showtime's answer to the HBO hit The Sopranos.

Berman lived just off the Sunset Strip on Alta Loma Road in West Hollywood for several years prior to her final residence in Benedict Canyon, in Los Angeles. Her manager, Nyle Brenner, later told the Los Angeles Times that "many details of Ms. Berman's personal life are unclear" and added "she had been married once in the 1980s, and later helped rear the two children of a boyfriend." Berman was married to Christopher "Mister" Margulies, in June 1984 at the Hotel Bel-Air; Durst walked Berman down the aisle. Margulies died of a heroin overdose in 1986. Berman kept close ties to friends on Alta Loma Road, at the Las Vegas Strip, and in New York City, including Durst.

Berman was found murdered, execution style with a 9mm handgun, on Christmas Eve 2000 in her rented Benedict Canyon home, and was presumed to have been dead at least one day.