Herbert Stuart Okun (November 27, 1930 – November 8, 2011)[1] was a United States Ambassador to East Germany (1980–1983) and the Deputy U.S. Ambassador to the United Nations (1985–1989). He was a member of the American Academy of Diplomacy. After his retirement from the U.S. State Department, he played a key role in unsuccessful efforts to halt the Balkan Wars in the early 1990s.