Imperial presidency is a term applied to the modern presidency of the United States. It became popular in the 1960s and served as the title of a 1973 book by historian Arthur M. Schlesinger, Jr., who wrote The Imperial Presidency to address two concerns: that the presidency was uncontrollable and that it had exceeded its constitutional limits. According to professor of political science Thomas E. Cronin, author of The State of the Presidency, the imperial presidency is a term used to define a danger to the American constitutional system by allowing presidents to create and abuse presidential prerogatives during national emergencies. This was based on: (1) presidential war powers vaguely defined in the Constitution, and (2) secrecy – a system used that shielded the Presidency from the usual checks and balances afforded by the legislative and judicial branches.

The term "imperial presidency" states that the office of President of the United States, akin to a classical ruler of an empire, is the head of state of a geographical, military and economic superpower, has broad executive power and is advised by a bureaucratic staff akin to a classical imperial court.