1990 PUMA Definitions

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The table below provides links to maps and composition files for the Public Use Microdata Areas (PUMAs) identified in the 1990 state (5%) and metro (1%) samples.

In some states, one or more PUMAs include noncontiguous parts. These parts are identified on the maps by a PUMA number followed by "(part)". Noncontiguous PUMAs occur for several reasons. For the metro (1%) sample, every effort was made to keep metropolitan and non-metropolitan areas separate. For the state (5%) sample, it was important to keep meaningful socioeconomic or planning areas together. In sparsely populated areas, it may have been necessary to delineate PUMAs with noncontiguous parts to meet minimum population criteria when the adjacent counties belonged to either a metropolitan area or local planning area.

PUMAs in the elderly (3%) sample have the same geographical components as in the state (5%) sample. The Census Bureau equated the State Planning Service Areas (PSAs) to the state PUMAs whenever the two were equal. If the two were not equal, the PSA code is 000.

In addition to the state-specific files listed below, complete composition information for all PUMAs, nationwide, is available in two rectangular Excel files: 1% Sample PUMAs and 5% Sample PUMAs.

1990 PUMA Maps and Composition Files by State

State State and Metro Sample Maps Detailed Composition (1% metro sample) Detailed Composition (5% state smpl, 3% elderly smpl)
Alabama map 1% metro sample 5% state sample
Alaska map 1% metro sample 5% state sample
Arizona map 1% metro sample 5% state sample
Arkansas map 1% metro sample 5% state sample
California map 1% metro sample 5% state sample
Colorado map 1% metro sample 5% state sample
Connecticut map 1% metro sample 5% state sample
Delaware N/A* 1% metro sample 5% state sample
District of Columbia map 1% metro sample 5% state sample
Florida map 1% metro sample 5% state sample
Georgia map 1% metro sample 5% state sample
Hawaii map 1% metro sample 5% state sample
Idaho map 1% metro sample 5% state sample
Illinois map 1% metro sample 5% state sample
Indiana map 1% metro sample 5% state sample
Iowa map 1% metro sample 5% state sample
Kansas map 1% metro sample 5% state sample
Kentucky map 1% metro sample 5% state sample
Louisiana map 1% metro sample 5% state sample
Maine map 1% metro sample 5% state sample
Maryland map 1% metro sample 5% state sample
Massachusetts map 1% metro sample 5% state sample
Michigan map 1% metro sample 5% state sample
Minnesota map 1% metro sample 5% state sample
Mississippi map 1% metro sample 5% state sample
Missouri map 1% metro sample 5% state sample
Montana map 1% metro sample 5% state sample
Nebraska map 1% metro sample 5% state sample
Nevada map 1% metro sample 5% state sample
New Hampshire map 1% metro sample 5% state sample
New Jersey map 1% metro sample 5% state sample
New Mexico map 1% metro sample 5% state sample
New York map 1% metro sample 5% state sample
North Carolina map 1% metro sample 5% state sample
North Dakota map 1% metro sample 5% state sample
Ohio map 1% metro sample 5% state sample
Oklahoma map 1% metro sample 5% state sample
Oregon map 1% metro sample 5% state sample
Pennsylvania map 1% metro sample 5% state sample
Rhode Island map 1% metro sample 5% state sample
South Carolina map 1% metro sample 5% state sample
South Dakota map 1% metro sample 5% state sample
Tennessee map 1% metro sample 5% state sample
Texas map 1% metro sample 5% state sample
Utah map 1% metro sample 5% state sample
Vermont map 1% metro sample 5% state sample
Virginia map 1% metro sample 5% state sample
Washington map 1% metro sample 5% state sample
West Virginia map 1% metro sample 5% state sample
Wisconsin map 1% metro sample 5% state sample
Wyoming map 1% metro sample 5% state sample
Puerto Rico map Files for Puerto Rico are not available
"99" (PUMAs that cross state lines) -- 1% metro sample --

* The PUMA map of Delaware has never been made available.

Boundary Files

All boundary files are provided as shapefiles within .ZIP files.

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