How Census Is Building a Citizenship Database Covering Everyone Living in the U.S.

How Census Is Building a Citizenship Database Covering Everyone Living in the U.S.

While the 2020 Decennial Count is underway, the Census Bureau is working on a separate effort to identify the percentage of the U.S. population that has legal citizenship. The result will be a Census-owned database of every person living in the U.S. with a statistical “citizenship estimate” linked to each individual.


The Trump administration initially pushed to include a citizenship question on the 2020 survey of America. However, in June of last year, the Supreme Court ruled 5-4 to prevent the administration from asking the question, citing poor justification for its inclusion.


A month after the ruling, President Trump signed Executive Order 13880, requiring the bureau to produce data on the citizen voting-age population, or CVAP, by the end of March 2021, and mandating relevant agencies share databases to help Census achieve that end.


Next year, the bureau will release a publicly-available statistical modeling of citizen and non-citizen populations throughout the country, anonymized using a cutting-edge masking system. The effort will also create a dataset with a citizenship estimate for every person in the U.S., which—by law and by practice—should never be seen outside of the Census Bureau.  


In an internal document obtained by Nextgov, bureau officials note the Census Unedited File—which is used to determine apportionments, including congressional representatives—will not contain any citizenship data. Instead, the bureau will create a separate micro-data file, or MDF, with the best citizenship estimate associated with each census respondent.


That micro-data file, along with the Census Edited File—an updated version of the CUF that corrects and backfills missing information—will be put through the 2020 Disclosure Avoidance System, “which will do the final re ..

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