Via the U.S. Census:
Summary profiles for geographic areas have been updated with the most recent information from frequently requested statistics from various Census Bureau programs including the 2010 Census, 2010 American Community Survey and 2007 Survey of Business Owners. These easy to access and easy to use tables are now available for the nation, state and counties and have expanded from places with populations of 25,000 or more to places with 5,000 or more. Tables also provide links to more detailed data sets.
Direct to U.S. Census QuickFacts