Frequently Asked Questions

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What geographic areas are identified in the American Community Survey (ACS) Public Use Microdata Sample (PUMS) file?

States, Puerto Rico, and Public Use Microdata Areas (PUMAs) are the only geographic areas identified in the ACS PUMS. While PUMAs can often be used to identify counties, cities, and metropolitan areas with populations of more than 100,000 people, the ACS PUMS does not include variables identifying these other types of areas.


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