Suggested websites

The Bureau of Economic Analysis

The Bureau of Economic Analysis website of the US Commerce Department.
This site has statistics on international trade and investment for the US. It also reports the national income and product accounts (NIPAs): gross domestic product (GDP) and related measures. There are also some regional measurements, including state GDPs.
http://www.bea.gov/

FRED

FRED of the Federal Reserve Bank of St. Louis.
This site complies economic, business, financial, fiscal, trade, and exchange rate data for the US from a number of government and private agencies.
http://research.stlouisfed.org/fred2/