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Decennial Census P.L. 94-171 Redistricting Data

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P.L. 94-171 Redistricting Data

Public Law (P.L.) 94-171, enacted by Congress in December 1975, requires the Census Bureau to provide states the opportunity to identify the small area geography for which they need data in order to conduct legislative redistricting. The law also requires the U.S. Census Bureau to furnish tabulations of population to each state, including for those small areas the states have identified, within one year of Census day.

Since the first Census Redistricting Data Program, conducted as part of the 1980 census, the U.S. Census Bureau has included summaries for the major race groups specified by the Statistical Programs and Standards Office of the U.S. Office of Management and Budget (OMB) in Directive 15 (as issued in 1977 and revised in 1997). Originally, the tabulation groups included White, Black, American Indian/Alaska Native, and Asian/Pacific Islander, plus “some other race.” These race data were also cross-tabulated by Hispanic/Non-Hispanic origin. At the request of the state legislatures and the Department of Justice, for the 1990 Census Redistricting Data Program, voting age (18 years old and over) was added to the cross-tabulation of race and Hispanic origin. For the 2000 Census, these categories were revised to the current categories used today.

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2020

Decennial Census P.L. 94-171 Redistricting Data

2020 Census (P.L. 94-171) Redistricting Data Summary Files

The U.S. Census Bureau provided redistricting data as legacy format summary files for all states on August 12, 2021. We reaffirm our commitment to providing the full redistricting data toolkit on Sept. 16, 2021.

2020 Census (P.L. 94-171) Geographic Products

Use the 2020 Tab of the linked page.
Use the 2020 Tab of the linked page. BAFs are meant to be used in conjunction with the NLTs.
Use the 2020 Tab of the linked page. NLTs are meant to be used in conjunction with the BAFs.
Use the 2020 Tab of the linked page. Select Block Relationship Files.

Group Quarters Assistance

The Census Bureau published a Federal Register Notice on the Final 2020 Census Residence Criteria and Residence Situations on February 8, 2018. In the Notice, the Census Bureau stated we will continue the practice of counting prisoners at the correctional facility, to ensure that the concept of usual residence is interpreted and applied consistent with the intent of the Census Act of 1790. The Notice also stated the Census Bureau recognizes that some states have decided, or may decide in the future, to ‘move’ their group quarters (GQ) population (e.g. student, military, and prisoner population) to an alternate address for the purpose of redistricting. To assist those states, the Census Bureau is offering the use of a geocoding service. This service was updated with 2020 Census geographic data in January 2021, to assist states with their goals of reallocating GQ population for legislative redistricting.

Explaining the 2020 Census Redistricting Data

Related Information



Additional 2020 Census Resources

Declarations filed in the case of Ohio v. Raimondo

Redistricting Data Summary Files expected by September 30, 2021

In declarations filed in the case of Ohio v. Raimondo, the U.S. Census Bureau made clear that we can provide a legacy format summary redistricting data file to all states by mid-to-late August 2021, now identified as August 16. We reaffirm our commitment to providing the full redistricting data toolkit by Sept. 30, 2021.

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