David Hacohen (Hebrew: דוד הכהן‎, born 20 October 1898, died 19 February 1984) was an Israeli politician who served as a member of the Knesset between 1949 and 1953, and again from 1955 until 1969. He fought with the Ottoman Army in World War I. After the war he studied law and economics in London, then returned to Mandatory Palestine in the 1920s. He was a member of Haganah, and served with the British in World War II. He was arrested by the British in Operation Agatha.