The Office of the Comptroller of the Currency (OCC) is a U.S. government agency that regulates and supervises national banks and federal savings associations. Established in 1863, its primary mission is to ensure the safety and soundness of the banking system, protect consumers, and promote fair access to financial services. The OCC is part of the U.S. Department of the Treasury and is headed by the Comptroller of the Currency. The agency issues charters to national banks, enforces banking laws, and conducts regular examinations to assess the financial health and compliance of these institutions.