US Department of Agriculture
Usda: Economic Research Service
This site has mounds of economic data for students to use as economic research. Data, focusing on agriculture, is compiled for each state. Topics are broken down for easy use and access.
Federal Reserve Bank
Federal Reserve Bank of St. Louis: Fred Economic Data
With files in many categories, FRED offers a wealth of historical US data on interest rates, business indicators, balance of payments, exchange rates, and lots more.