List of U.S. executive branch czars

In the United States, the informal term "czar" (or, less often, "tsar") is employed in media and popular usage to refer to high-level executive branch officials who oversee a particular policy field. The earliest known use of the term for a U.S. government official was in the administration of Franklin Roosevelt (1933–1945), during which eleven unique positions (or twelve if one were to count "economic czar" and "economic czar of World War II" as distinct) were so described.

Source: Wikipedia — List of U.S. executive branch czars (CC BY-SA 4.0)