Dan Greenburg (born June 20, 1936) is an American author and screenwriter. He was born in Chicago, Illinois.
He co-wrote the screenplay for the 1968 MGM movie Live a Little, Love a Little starring Elvis Presley, which was based on his 1965 novel Kiss My Firm But Pliant Lips.
His works include titles for adult readers. His popular book series for grade-school age children, The Zack Files, was the inspiration for a television show of the same name.
Greenburg has been married three times. His first wife was writer Nora Ephron; their marriage ended in divorce after six years. His second wife, from 1980-1998, was reporter Suzanne O'Malley, who wrote a series of articles on the Andrea Yates case, later resulting in her book, Are You There Alone: The Unspeakable Crime of Andrea Yates (2004). Before their divorce, Greenburg and O'Malley had a son, Zack O'Malley Greenburg, after whom his father named his best-selling series of children's books. Zack played the title role of Lorenzo in the film Lorenzo's Oil. Greenburg is currently married to Judith C. Wilson, who as J.C. Greenburg writes children's books.