If you are looking for statistics at the county level in addition to what the Census Burea collects, USA Counties can help http://censtats.census.gov/usa/usa.shtml

USA Counties features over 6,800 data items for the United States, States and counties from a variety of sources including the U. S. Census Bureau, Bureau of Economic Analysis, Bureau of Labor Statistics, Federal Bureau of Investigation, and Social Security Administration.

Topics: age, agriculture, ancestry, banking, building permits, business patterns, crime, earnings, education, elections, employment, government, health, households, housing, income, labor force, manufactures, population, poverty, retail trade, social programs, veterans, vital statistics, water use, and wholesale trade.

Updates can be tracked easily by clicking on the What's New Link.