Federal Government
The United States of America is a federal constitutional republic comprising of fifty states and a federal district. At 3.79 million square miles and with about 309 million people, the United States is the third largest country both by land area and population.
U.S. General Services Administration
1800 F Street, NW
Washington, DC 20405
Phone: 800-FED-INFO (1-800-333-4636)
http://www.usa.gov