Help End Prison Gerrymandering Prison gerrymandering funnels political power away from urban communities to legislators who have prisons in their (often white, rural) districts. More than a decade ago, the Prison Policy Initiative put numbers on the problem and sparked the movement to end prison gerrymandering.

Can you help us continue the fight? Thank you.

—Peter Wagner, Executive Director
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2020 Group quarters shapefile

To make the it easier for redistricting professionals and advocates to locate the correctional facilities within legislative districts, the Prison Policy Initiative produced a point shapefile with the correctional population counts for each block in the country.

The shapefile can be accessed here and a description of each field is below.

STATEABR
This is the 2 digit postaal code for the state.
COUNTY
This 3 digit ANSI (formerly FIPS) code is each county in the state. (Note that county numbers are only unique within each state.)
TRACT
This 6 digit code is the number for each tract. (Note that tract numbers are only unique within each county.)
BLOCK
This 4 digit code is the number for each block. (Note that block numbers are only unique within each tract.)
GEOID
This 15 digit code is the number for each block in the country. The first two digits are the state, the next three digits are the county, the next 6 digits are the tract, the last four digits are the block.
TOTALPOP
This is the number of people in the block, from the PL94-171 file, Table 1.
QUARTERPOP
Population in group quarters - all, from the PL94-171 file, Table 5
INSTPOP
Population in institutionalized group quarters - all, from the PL94-171 file, Table 5
CORRPOP
Population in institutionalized group quarters - correctional facilities, from the PL94-171 file, Table 5
JUVPOP
Population in institutionalized group quarters - juvenile, from the PL94-171 file, Table 5
NURSINGPOP
Population in institutionalized group quarters - nursing homes, from the PL94-171 file, Table 5
OTHERINSTPOP
Population in other institutionalized group quarters - other, from the PL94-171 file, Table 5
NONINSTPOP
Population in non-institutionalized group quarters - all, from the PL94-171 file, Table 5
COLLEGEPOP
Population in non-institutionalized group quarters - college dorms, from the PL94-171 file, Table 5
MILITARYPOP
Population in non-institutionalized group quarters - military quarters, from the PL94-171 file, Table 5
OTHERNONINSTPOP
Population in non-institutionalized group quarters - other, from the PL94-171 file, Table 5
RACE_WHITE
This is the number of people identified as "White alone" in 2020 PL94-171 Summary File Table P1
RACE_BLACK
This is the number of people identified as "Black of African American alone" in 2020 PL94-171 Summary File Table P1
RACE_INDIAN
This is the number of people identified as "American Indian and Alaska Native alone" in 2020 PL94-171 Summary File Table P1
RACE_ASIAN
This is the number of people identified as "Asian alone" in 2020 PL94-171 Summary File Table P1
RACE_PACIFIC
This is the number of people identified as "Native Hawaiian and Other Pacific Islander alone" in 2020 PL94-171 Summary File Table P1
RACE_SOME_OTHER
This is the number of people identified as "Some Other Race alone" in 2020 PL94-171 Summary File Table P1
RACE_TWO_OR_MORE
This is the number of people identified as reporting "two or more races" in 2020 PL94-171 Summary File Table P1
RACE_HISPANIC
This is the number of people identified as "Hispanic or Latino" in 2020 PL94-171 Summary File Table P2. (Note that "Hispanic or Latino" is considered an ethnicity by the Census Bureau and that people who are "Hispanic or Latino" may be of any race.)
RACE_WHITE_NOT_HISPANIC
This is the number of people identified as "Not Hispanic or Latino: White alone" in 2020 PL94-171 Summary File Table P2.
LATITUDE
This is the latitude of the centroid of the block.
LONGITUDE
This is the longitude of the centroid of the block.
URL
Any block that contains a population counted in a correctional facility includes a URL to that block's entry in the Prison Policy Initiative's database of annotations of facilities. This database is being constantly updated with additional demographic data and facility identifications, and can accept suggestions and corrections from users. To that you can access the most current data, we recommend accessing this database from the web or via HTML PopUps in ArcGIS rather than importing it directly into your local database. We can also accept additional annotations via this link.


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