The libraries at the University of Central Florida have collected the sources used for STAT-USA and made a long--very thorough!--list of links to get to them. This is a sample of the most useful resources.
STAT-USA pulled together information from many different sources, some of which are available from other government websites (e.g. Bureau of Economic Analysis, Bureau of Labor Statistics, andFederal Reserve), indicated by links in the list below.
State of the Nation - "The Federal Government's best resource for monitoring the U.S. economy."
These links lead to free websites. You can find more details in the Business Source Complete database with published information in Country Reports from the Economist Intelligence Unit or the Political Risk Yearbook, and Country Reviews by CountryWatch.