FDIC - Federal Deposit Insurance Corporation
Probably the best single source for statistical information about banks and banking.
Federal Financial Institutions Examination Council
Includes an automated geocoding system.
Federal Financial Institutions Examination Council Appraisal Subcommittee
Includes an online registry.
Federal Home Loan Bank of Indianapolis
Federal Reserve Bank System
Each Federal Reserve Bank web site is listed here.
NIC - National Information Center of Banking Information
Find which bank acquired which other bank and when. Also, info about bank holding companies.
OFAC - Office of Foreign Assets Control
Includes lists of specialty designated nationals and blocked persons.
U.S. House Committee on Financial Services
Schedules, press releases, testimony, and more.