A presidential directive, or executive action, is a written or oral instruction or declaration issued by the president of the United States, which may draw upon the powers vested in the president by the U.S. Constitution, statutory law, or, in certain cases, congressional and judicial acquiescence. Such directives, which have been issued since the earliest days of the federal government, have become known by various names, and some have prescribed forms and purposes. Presidential directives remain in effect until they are revoked, which the president is free to do. The classification of presidential directives is not easily done, as the distinction between the types can be quite arbitrary, arising from convenience and bureaucratic evolution, and none are defined in the Constitution. Furthermore, the different types may overlap. As one legal scholar put it: "it is a bit misleading to overclassify presidential directives as comprising separate and distinct 'types' just because they have different headings at the top of the first page." In terms of legal applicability, what matters is the substance of the directive, not the form, unless a certain kind of directive is specifically required by relevant statute.

The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.