Curtis Marsena "Curt" Gentry was an American writer, born in Lamar, Colorado. He is best known for co-authoring, with Vincent Bugliosi, the 1974 book Helter Skelter, which detailed the Charles Manson murders. Gentry lived in San Francisco, California.

Gentry served in the Air Force during the Korean War, mostly as a writer on the Pacific Stars and Stripes newspaper in Tokyo. Frame-Up was a nominee for the 1968 Edgar Award from the Mystery Writers of America for Best Fact Crime book. Helter Skelter won a 1975 Edgar Award from the Mystery Writers of America for Best Fact Crime book. J.Edgar Hoover won the 1992 PEN Center West Literary Award for Non-Fiction.

Gentry died, aged 83, on July 10, 2014, in San Francisco.