Federal Deposit Insurance Corporation (FDIC)
Administers the federal deposit insurance fund, manages banks that are placed into receivership, and supervises state-chartered banks that are not members of the Federal Reserve System.

Federal Reserve System
Formulates monetary policy for the U.S., regulates and supervises bank holding companies and state-chartered banks that are members of the System, develops and administers regulations that implement major federal laws for both safety & soundness and consumer protection.

Office of the Comptroller of the Currency (OCC)
The Office of the Comptroller of the Currency (OCC) charters, regulates, and supervises all national banks. It also supervises the federal branches and agencies of foreign banks.

Conference of State Bank Supervisors (CSBS)
Promotes and advances professionalism in all state banking departments.

State banking departments
Each state has a department or commission that charters and supervises its state banks. This link takes you to a listing of banking departments and their contact information for all 50 states, the District of Columbia, and U.S. possessions.

Federal Financial Institutions Examination Council (FFIEC)
The Council is a formal, interagency body empowered to prescribe uniform principles, standards, and report forms for the federal examination of financial institutions by the Board of Governors of the Federal Reserve System (FRB), the Federal Deposit Insurance Corporation (FDIC), the National Credit Union Administration (NCUA), the Office of the Comptroller of the Currency (OCC), and the Office of Thrift Supervision (OTS), and to make recommendations to promote uniformity in the supervision of financial institutions.