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Public Use Microdata Areas (PUMAs)

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Public Use Microdata Areas (PUMAs) are geographic areas defined for the use with decennial census Public Use Microdata Sample (PUMS) data, American Community Survey (ACS) (ACS) PUMS data and ACS period estimates.

This section reviews access to and use of Census 2000 PUMA shapefiles. The Census 2010 PUMA shapefiles will be also be covered in this section as those files become available. Progressively, the focus of this section will be on the 2010 vintage PUMA.

As 2010 PUMAs are expected to be comprised of census tract units or building blocks, an important dimension to the use of the 2010 PUMAs will be the use of corresponding census tract shapefiles.

Schedule and Availability
Presently the most recent PUMAs are the Census 2000 vintage. Census 2010 PUMAs are now under development and will be available in 2012.

Presently the ACS 2010 PUMS data are available for the Census 2000 vintage PUMAs. In late 2012 or 2013, Census 2010 PUMS data for Census 2010 vintage PUMAs will become available. Also in late 2012 or 2013, ACS 2010 and 2011 PUMS data for Census 2010 vintage PUMAs will become available.

Census 2010 PUMAs
Under development, the Census 2010 PUMAs are organized within states or equivalent entities. Features:
• Cover the entirety of the United States, Puerto Rico, and the Island Areas that contain a 2010 Census population of 100,000.
• Are built on counties and census tracts (PUMA delineations are subject to population thresholds and building block geography)
• Must be geographically contiguous (unless the geographical features of the county or census tract used as a building block are noncontiguous, i.e. islands, offshore features)

ACS 2010 PUMS Using Census 2000 PUMAs
The smallest geographic unit identified is the Public Use Microdata Area (PUMA). PUMAs were created for the 2000 Census 5% PUMS data files.

This section will be updated soon. Please view What's New & Ahead for Website updates.

Additional Information
Proximity develops geographic-demographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data.