American FactFinder
Easily accessible population, census, and demographic data from the U.S. Census Bureau. Includes searchable tables, data sets, and maps.

Bureau of Labor Statistics
Provides accurate and timely data about the social and economic conditions of the United States, its workers, workplaces, and workers’ families.

Access official statistics collected and published by more than 100 Federal agencies. Includes economic and population trends, education, health care costs, aviation safety, foreign trade, energy use, farm production, and more.

OECD Factbook 
Economic statistics in all areas.

See also

Census Data
Public opinion Polls and Data