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American Community Survey

This survey from the U.S. Census Bureau has replaced the decennial census "long-form" to provide more current estimates for education, occupation and other socio-economic characteristics.

Get the Data

Find out when to use 1-year vs. 3-year or 5-year estimates. For those who want more detail on the methods used to collect the data and insights on margins of error, use of small area data and other topics, your best bet is the ACS website. 

Margins of Error and Statistical Significance

Fast Facts on the ACS Estimates

1-Year Estimates

The 2013 ACS 1-year estimates are based on data collected between January 2013 and December 2013.

  • Published for selected geographic areas with populations of 65,000 or greater
  • Represent the average characteristics over calendar year
  • Have smaller sample size than the 3-year and 5-year estimates
  • Are more current than the 3-year estimates and 5-year

3-Year Estimates

The 2011-2013 ACS 3-year estimates are based on data collected between January 2011 and December 2013.

  • Published for selected geographic areas with populations of 20,000 or greater
  • Represent the average characteristics over the 3-year period of time
  • Have larger sample size than the 1-year estimates but smaller than the 5-year

5-Year Estimates

The 2009-2013 ACS 5-year estimates are based on data collected between January 2009 and December 2013.

  • Published for small geographic areas
  • Represent the average characteristics over the 5-year period of time
  • Have larger sample size than the 1-year and 3-year estimates
  • Are less current than the 1-year and 3-year estimates

Comparing to Prior Census Data

The 5-year estimates (and the other years from ACS) are not always comparable to the long-form data from previous censuses. Here are some tools to help find comparable tables between the ACS and decennial data.

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