• U.S. Census State and County Profiles
• Time - U.S. Naval Observatory
• Global Position Satellites - U.S. Naval Observatory
• Global Positioning System - U.S. Coast Guard Navigation Center
• US Postal Service - Zip Code finder
• US Library of Congress
• US Census Bureau
• GPO Access on the Web (Government Printing Office)
• Code of Federal Regulations (CFR)
• Google  US Government

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• Executive Office of the President (White House)
  • The President's Cabinet
  • Independent Federal Agencies and Commissions
• U.S. House of Representatives
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• U.S. Senate

time.gov

geodata.gov

science.gov

grants.gov

fedstats.gov