NEW YORK — Robert Towne, the Oscar-winning screenplay writer of “Shampoo,” “The Last Detail” and other acclaimed films whose work on “Chinatown” became a model of the art form and helped define the jaded allure of his native Los Angeles, died Monday. He was 89.

Towne died surrounded by family at his home in Los Angeles, said publicist Carri McClure. She declined to comment on a cause of death.

In an industry which gave birth to rueful jokes about the writer’s status, Towne for a time held prestige comparable to the actors and directors he worked with. Through his friendships with two of the biggest stars of the 1960s and ’70s, Warren Beatty and Jack Nicholson, he wrote or co-wrote some of the signature films of an era when artists held an unusual level of creative control. The rare “auteur” among screen writers, Towne managed to bring a highly personal and influential vision of Los Angeles onto the screen.

“It’s a city that’s so illusory,” Towne said in 2006. “It’s the westernmost west of America. It’s a sort of place of last resort. It’s a place where, in a word, people go to make their dreams come true. And they’re forever disappointed.”

Towne won an Academy Award for “Chinatown” and was nominated three other times, for “The Last Detail,” “Shampoo” and “Greystoke.” In 1997, he received a lifetime achievement award from the Writers Guild of America.

Towne’s success came after a long stretch of working in television, including “The Man from U.N.C.L.E” and “The Lloyd Bridges Show,” and on low-budget movies for “B” producer Roger Corman. In a classic show business story, he owed his breakthrough in part to his psychiatrist, through whom he met Beatty, a fellow patient. As Beatty worked on “Bonnie and Clyde,” he brought in Towne for revisions of the Robert Benton-David Newman script and had him on the set while the movie was filmed in Texas.

Towne’s contributions were uncredited for “Bonnie and Clyde,” the landmark crime film released in 1967, and for years he was a favorite ghost writer. He helped out on “The Godfather,” “The Parallax View” and “Heaven Can Wait” among others and referred to himself as a “relief pitcher who could come in for an inning, not pitch the whole game.” But Towne was credited by name for Nicholson’s macho “The Last Detail” and Beatty’s sex comedy “Shampoo” and was immortalized by “Chinatown,” the 1974 thriller set during the Great Depression.

“Chinatown” was directed by Roman Polanski and starred Nicholson as J.J. “Jake” Gittes, a private detective asked to follow the husband of Evelyn Mulwray (played by Faye Dunaway). The husband is chief engineer of the Los Angeles Department of Water and Power and Gittes finds himself caught in a chaotic spiral of corruption and violence, embodied by Evelyn’s ruthless father, Noah Cross (John Huston).

Influenced by the fiction of Raymond Chandler, Towne resurrected the menace and mood of a classic Los Angeles film noir. Clues accumulate into a timeless detective tale, and lead helplessly to tragedy, summed up by one of the most repeated lines in movie history, words of grim fatalism a devastated Gittes receives from his partner Lawrence Walsh (Joe Mantell): “Forget it, Jake, it’s Chinatown.”

Towne’s script has been a staple of film writing classes ever since.