A proclamation (Lat. proclamare, to make public by announcement) is an official declaration issued by a person of authority to make certain announcements known. Proclamations are currently used within the governing framework of some nations and are usually issued in the name of the head of state. A proclamation is (usually) a non-binding notice.

A general distinction is made between official proclamations from states or state organs with a binding character and proclamations from political-social groups or organizations, both of which try to win over the mood of those addressed. In addition, the procedure of proclaiming the beginning of a rule over a certain ruling territory is called a proclamation. For example, on July 26, 1581, the Proclamation of Dutch Independence was signed which led to the creation of the Dutch Republic in 1588, formally recognized in 1648 by the Peace of Münster.

The announcement of the intention to marry two people, the bidding, was referred to as a "proclamation" because it was done by reading out a corresponding text during the service.

In the cities, laws, ordinances, etc. were “proclaimed” up to modern times so that they would become known and effective.