Part of the Census Bureau, this website provides population, housing, economic, and geographic data and statistics. You can get breakdowns of statistics by large areas or as specific as a zip code.
Demographic data for the United States. Statistics and information on population, housing, public health, education, transportation, local/state governments, and business and international trade.
The NCHS publishes statistics and information on American's health. Topics covered include mortality, diseases and conditions, workplace safety and health, environmental health, injury, violence, and emergency preparedness.