Check on the ArcGIS Resource Center for the new 2010 U.S. Census datasets with their new geometry and attributes that are now available as layer packages on ArcGIS.com. The following are all represented as polygons: Block Group, Tract, County, and State with over 40 attribute fields containing population totals by age and race, along with family and household information. Census Blocks are represented as points with total population and household information.
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