Data Releases

Leading up to the annual release of new datasets, the Census Bureau publishes a schedule, notes about new estimates or new guidance, and technical information about geography and product changes. Users can also browse the notes from previous years using the tabs below.

2011
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  • 2007

2011

Details About the 2011 Release

Geographic Notes

  • The 2007-2011 ACS 5-year data release marks the first time estimates for ZIP Code Tabulation Areas (ZCTAs) are available. Learn how ZCTAs are different from ZIP Codes.
  • ACS Estimates for Urban Areas and PUMAs continue to use Census 2000 definitions. These geographies will use 2010 Census definitions in the 2012 ACS data release planned for 2013.

Page Last Revised - February 20, 2025