Welcome To The Gallup Organization
Excellent source for public opinion polls

 U.S. Census Bureau Home Page
Official US Government statistics on just about everything

Statistical Resources on the Web
Very comprehensive statistical resource edited by University of Michigan library

 FedWorld Information Network
Features keyword searching for government information, documents and files.  You can get your tax forms here, too.

 Bureau of Labor Statistics
US Department of Labor statistics plus information relating to the economy, numerous surveys and regional information

 Information Please and Lycos
Provides access to millions of facts from the various Information Please Almanacs

 UVA Social Science Data Center
Many economic and demographic studies 

LibrarySpot
Useful statistics about nearly everything