By Robert Warren.

This report describes estimates of the undocumented population residing in the United States in 2022 compiled by CMS. The estimates are based on data collected in the American Community Survey (ACS) conducted by the US Census Bureau.

The report finds that the undocumented population grew from 10.3 million in 2021 to 10.9 million in 2022, an increase of 650,000. The increase reverses more than a decade of gradual decline. The undocumented populations from 10 countries increased by a total of 525,000. The report explains why undocumented population growth is much less than the number of apprehensions by the Department of Homeland Security. Finally, the Appendix provides a detailed description of the CMS methodology.

The report includes the following topline findings:

• After remaining at or near zero growth from 2010 to 2021, the US undocumented population increased by 650,000 in 2022.

• The largest population gains in 2022 were for Central America (205,000), South America (200,000), and Asia (140,000).

• From 2015 to 2022, the undocumented population from Mexico declined by 1.3 million; in the same period, the combined population from Central and South America increased by 1.2 million.

The report describes changes in the US undocumented population by country of origin and state of residence since 2018 with special emphasis on changes from 2021 to 2022. The rapid increase in annual apprehensions and expulsions of migrants along the U.S.-Mexico border that began in 2019 has dominated media attention on migration for the past four years. That, in turn, has focused attention on the prospect of large annual increases in the undocumented population. Unfortunately, ACS data needed to monitor changes in the population are not available until about a year after the ACS survey is completed. The unique CMS methodology made it possible to derive these estimates less than two months after the release of 2022 ACS data.