American Factfinder (http://factfinder.census.gov/)
Gateway to population and housing data from Census 2000 and the 1990 Census, as well as industry and business data from the 1997 Economic Census.

Census Economic Briefing Room (http://www.census.gov/cgi-bin/briefroom/BriefRm)
Provides statistical updates on categories such as poverty, homeownership, new home sales, and more.

U. S. Census Bureau (http://www.census.gov/)
Searchable gateway to Census information on population, business statistics, geography, and publications.

CenStats Databases (http://censtats.census.gov/)
CenStats is a collection of statistical resources offered by the U.S. Census Bureau. Topics include building permits, county business patterns, and demographic and economic data for states and counties.

Demographics - Fedstats (http://www.fedstats.gov/)
Site provides links to key demographic statistics from various federal agencies including the Administration for Children & Families, Food & Nutrition Service, and the National Science Foundation, just to name a few.

United States Historical Census Data Browser (http://fisher.lib.virginia.edu/collections/stats/histcensus/)
Describes the population and economy of U.S. states and counties from 1790 to 1960.

The White House: Social Statistics Briefing Room: Demography (http://www.whitehouse.gov/fsbr/demography.html)
Site provides links to demographic information about homeownership, household wealth, world population, and more.