Rational-legal authority (also known as rational authority, legal authority, rational domination, legal domination, or bureaucratic authority) is a form of leadership in which the authority of an organization or a ruling regime is largely tied to legal rationality, legal legitimacy and bureaucracy. The majority of the modern states of the twentieth and twenty-first centuries are rational-legal authorities, according to those who use this form of classification.
In sociology, the concept of rational-legal domination comes from Max Weber's tripartite classification of authority (one of several classifications of government used by sociologists); the other two forms being traditional authority and charismatic authority. All of those three domination types represent an example of his ideal type concept. Weber noted that in history those ideal types of domination are always found in combinations.
In traditional authority, the legitimacy of the authority comes from tradition. Charismatic authority is legitimized by the personality and leadership qualities of the ruling individual. Finally, rational-legal authority derives its powers from the system of bureaucracy and legality.