Don Mankiewicz (born January 20, 1922) is a screenwriter.
Born in Berlin, Germany, he is the son of Sara (Aaronson) and Herman J. Mankiewicz. He was nominated for the 1958 Academy Award for Writing Adapted Screenplay for I Want to Live! Among his many television credits are Ironside, for which he wrote the pilot, the original Star Trek (episode "Court-Martial") and the mini-series adaptation of President John F. Kennedy's book, Profiles in Courage. His son is screenwriter/producer John Mankiewicz.