ICPSR
Inter-University Consortium for Political & Social Research. See Ryan Johnson for details.
Lexis Nexis Statistical Universe
Statistics on all subjects, U.S. and international. The How Do I... link provides several examples of searches for commonly-sought figures.
Stat-USA
Comprised of two parts: State of the Nation for news and statistical releases regarding the nation's economy, and Globus & NTDB, with the International Trade Library and market and country research. Each provides access to thousands of domestic and international resources. Request password from the Government Information desk or the Reference desk.
American Fact Finder
A source for population, housing, economic, and geographic data from the US Census Bureau.
Bureau of Economic Analysis
Contains relevant Survey of Current Business articles and interactive databases for national, regional, industry, and international accounts.
Bureau of Labor Statistics
Databases, tables & calculators by subject, full of tutorials to help you get the most from the website, plus links to the BLS FTP server (for those needing large volumes of data).
Data Sets from SUNY-Oswego
Maintained by the Economics department of SUNY-Oswego, this is a comprehensive collection of data sets freely available on the Internet.
Economagic.com: Economic Time Series Page
Over 100,000 data files, with charts and Excel files for each.
Economic Research @ The St. Louis Federal Reserve Bank
The Federal Reserve Bank of St. Louis is the center of the Eighth District of the Federal Reserve System, including Arkansas, eastern Missouri, southern Illinois and Indiana, western Kentucky and Tennessee, and northern Mississippi. This site provides the frequently updated Federal Reserve Economic Data (FRED) and new FRED II database, as well as working papers, conference publications, email notifications and journal articles.
FedStats
Fedstats provides links to more than 100 agencies and the statistics they produce; searchable by program, agency, topic, and geographic region.
OECD Statistics Portal
The Organisation for Economic Co-operation and Development gathers and posts data via Country Statistical Profiles, the OECD Factboook, statistical news releases, the new OECD Statistics Dissemination Project, plus provides links to other world statistical websites.
World Bank Research Datasets
Provides free datasets to help foster the creation of new knowledge.