Public Use Microdata Area

A Public Use Microdata Area (PUMA) is a geographic unit used by the US Census for providing statistical and demographic information. Each PUMA contains at least 100,000 people. PUMAs do not overlap, and are contained within a single state. PUMAs were first created for the 1990 Census. based on the results of the 2020 Census, there are 2,487 PUMAs.

PUMAs allow the Census to publish census data for sub-state areas throughout every state. For example, the ACS publishes detailed data every year, but due to their sampling procedure only publishes data for census area that have more than 65,000 People. Only seven of the 55 counties of West Virginia were large enough to receive estimates from the 2006 ACS. In contrast, all 12 PUMAs that partition West Virginia received 2006 ACS estimates.

The state governments drew PUMA boundaries for the 2000 Census, to allow reporting of detailed data for all areas. There were a total of 2,071 PUMAs in the 2000 Census.

PUMAs by State

+ Count of PUMAs by state or territory based on Census 2020 results State or Territory Count of PUMAs, 2020 Total Population Average Population per PUMA Alabama 39 5,024,279 128,828 Alaska 5 733,391 146,678 Arizona 57 7,151,502 125,465 Arkansas 20 3,011,524 150,576 California 281 39,538,223 140,705 Colorado 45 5,773,714 128,305 Connecticut 25 3,605,944 144,238 Delaware 8 989,948 123,744 District of Columbia 6 689,545 114,924 Florida 168 21,538,187 128,203 Georgia 77 10,711,908 139,116 Guam 1 153,836 153,836 Hawaii 10 1,455,271 145,527 Idaho 14 1,839,106 131,365 Illinois 88 12,812,508 145,597 Indiana 51 6,785,528 133,050 Iowa 24 3,190,369 132,932 Kansas 21 2,937,880 139,899 Kentucky 35 4,505,836 128,738 Louisiana 35 4,657,757 133,079 Maine 10 1,362,359 136,236 Maryland 48 6,177,224 128,692 Massachusetts 54 7,029,917 130,184 Michigan 68 10,077,331 148,196 Minnesota 48 5,706,494 118,885 Mississippi 21 2,961,279 141,013 Missouri 47 6,154,913 130,956 Montana 8 1,084,225 135,528 Nebraska 14 1,961,504 140,107 Nevada 20 3,104,614 155,231 New Hampshire 10 1,377,529 137,753 New Jersey 74 9,288,994 125,527 New Mexico 17 2,117,522 124,560 New York 144 20,201,249 140,286 North Carolina 76 10,439,388 137,360 North Dakota 6 779,094 129,849 Ohio 90 11,799,448 131,105 Oklahoma 31 3,959,353 127,721 Oregon 35 4,237,256 121,064 Pennsylvania 95 13,002,700 136,871 Puerto Rico 24 3,285,874 136,911 Rhode Island 7 1,097,379 156,768 South Carolina 41 5,118,425 124,840 South Dakota 6 886,667 147,778 Tennessee 58 6,910,840 119,152 Texas 217 29,145,505 134,311 Utah 23 3,271,616 142,244 Vermont 4 643,077 160,769 Virginia 60 8,631,393 143,857 Washington 61 7,705,281 126,316 West Virginia 12 1,793,716 149,476 Wisconsin 43 5,893,718 137,063 Wyoming 5 576,851 115,370 TOTAL 2,487 334,888,991 134,656

Public Use Microdata Area

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