Absolute monarchy or despotic monarchy is a monarchical form of government in which the monarch has absolute power among his or her people. An absolute monarch wields unrestricted political power over the sovereign state and its people. Absolute monarchies are often hereditary but other means of transmission of power are attested. Absolute monarchy differs from constitutional monarchy, in which a monarch's authority in a constitutional monarchy is legally bounded or restricted by a constitution.

An autocracy is a system of government in which supreme power is concentrated in the hands of one person, whose decisions are subject to neither external legal restraints nor regularized mechanisms of popular control (except perhaps for the implicit threat of a coup d'état or mass insurrection). Absolute monarchy and dictatorship are the main historical forms of autocracy.