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Headquarters (HQ) denotes the location where most, if not all, of the important functions of an organization are coordinated. In the United States, the corporate headquarters represents the entity at the center or the top of a corporation taking full responsibility for managing all business activities. In the UK, the term head office is most commonly used for the HQs of large corporations. The term is also used regarding military organizations.

A headquarters is the entity at the top of a corporation that takes full responsibility for the overall success of the corporation, and ensures corporate governance. The corporate headquarters is a key element of a corporate structure and covers different corporate functions such as strategic planning, corporate communications, tax, legal, marketing, finance, human resources, information technology, and procurement. This entity includes the chief executive officer (CEO) as a key person and his or her support staff such as the CEO office and other CEO-related functions; the "corporate policy making" functions, including all corporate functions necessary to steer the firm by defining and establishing corporate policies; the corporate services encompassing activities that combine or consolidate certain enterprise-wide needed support services, provided based upon specialized knowledge, best practices, and technology to serve internal (and sometimes external) customers and business partners; and the bidirectional interface between corporate headquarters and business units.

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