Census 2020 Redistricting Data
The Census Bureau released the 2020 Census Redistricting Data for all states on August 12, 2021. This data is used by states to redraw congressional and legislative district boundaries. This data was released on the Census Bureau’s public FTP site in “legacy” data format and released the same data in easier-to-use formats on September 30, 2021 via data.census.gov.
Pennsylvania grew by 2.4% over the last decade
Between 2010 and 2020, Pennsylvania’s population grew from 12,702,379 to 13,002,700, an increase of 300,321 or 2.4%. Over this same period, 44 Pennsylvania counties lost population and 23 grew. See our Research Brief for additional information.
County and municipal level visualizations are available on our website for analyzing additional statistics. We also have a downloadable Municipality Population Percentage Change Map.
If you need to analyze data for all Pennsylvania counties or municipalities, we have provided an excel file with the 2020 and 2010 populations and the percent change. If you are looking for historical data, our updated product provides population for counties and municipalities from 1960 to 2020 with percent change included. This is an electronic product only and can be purchased on our eStore in Decennial Census Products category.
The Census Bureau used a new method of privacy protection for the 2020 Census, Differential Privacy. To learn more about privacy protections for the 2020 Census Redistricting Data, please see this Census Fact Sheet. There is additional information about the Census Disclosure Avoidance Modernization on their website.
As governments begin reviewing their official 2020 Census data, the Count Question Resolution Program provides a method to request a review of Census results to ensure that population and housing units were correctly allocated. In December of 2021, the Census Bureau will notify tribal, state and local government officials of their eligibility for the program and governments can begin filing challenges through the program in January of 2022. For additional information about this program, visit the Count Question Resolution Program page on the Census website.
The PaSDC will continue developing research reports and visualizations analyzing the 2020 Census Redistricting Data File so check back often for updates.