2010 PUMA Definitions

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The 2010 version of Public Use Microdata Areas (PUMAs) is the lowest level of geography identified in 2010 census samples and in samples from the American Community Survey (ACS) and Puerto Rico Community Survey (PRCS) for 2012 and later years.

The Census Bureau redraws PUMA boundaries every 10 years based on population information gathered from the most recent decennial census. ACS/PRCS samples incorporate the new PUMAs within a few years of the Decennial Census. 2012 was the first ACS/PRCS sample to use the 2010 PUMAs. Detailed maps of each individual 2010 PUMA can be downloaded from the Census Bureau's Reference Map page.

In Multi-Year ACS/PRCS files, the version of PUMAs identified depends on the year of interview (see MULTYEAR). For example, in the 2010-2012 3-year ACS sample, 2000 PUMA codes are reported for 2010 and 2011 respondents, and 2010 PUMA codes are reported for 2012 respondents.

Relationships between 2000 and 2010 PUMAs:

The map below shows both the 2010 (in blue) and 2000 (in yellow) PUMA definitions. Clicking on the map will highlight and identify the county, 2000 PUMA, and 2010 PUMA for the selected location. You can select which boundaries you want to view using the Layers menu at the top of the map. There is also a larger map containing the same information.

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Boundary File