EconSources	This website goes with "A Guide to Everyday Economic Statistics" used in Econ 309.
Resources for Economists on the Internet	Provides links to data sources and research.  Found by Toby Reyes.
Economagic	A great source for data.  If you subscribe, you can download data in Excel spreadsheets.  A regular “level 1” subscription is $10 for 8 weeks.
Bureau of Labor Statistics	Tons of data paid for by your tax dollars.  Found by Michael Sudjati.
US Census Bureau	There’s a lot more here than just the 10-year population census that most people are familiar with.
2010 Statistical Abstract of the US	A wide variety of economic and demographic data from the federal government.
Penn World Tables	Provides purchasing power parity and national income accounts converted to international prices for 188 countries for some or all of the years 1950-2004.
FedStats	Provides access to a large array of government statistics, by state and by subject.
Econdata.net	Has a large number of links to data sources, organized by type of data.
Dismal Science	Provides current economic news and statistics.  Found by Jamie Neri.
San Fernando Valley Economics Research Center	This center, housed in the California State University-Northridge Economics Department, provides data and analysis concerning the San Fernando Valley economy.  Found by Cristina Banas.
Economics of Networks	Rated one of the top 5 sites by The Economist magazine.  This site has information on the economics of computer networks as well as detailed information about the Microsoft antitrust case.  Found by Sarah Oganesyan.