Executive Summary This report describes estimates of the undocumented population residing in the United States in 2022 compiled by the Center for Migration Studies of New York (CMS). The estimates are based on data collected in the American Community Survey (ACS) conducted by the US Census Bureau ( Ruggles et al. 2023 ). 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: Mexico, the Dominican Republic, and India; El Salvador, Guatemala, and Honduras in Central America; and Brazil, Colombia, Ecuador, and Venezuela in South America. The undocumented population in Florida increased by about 125,000 in 2022, Texas increased by 60,000, New York by 50,000, and Maryland by 45,000. The report explains why undocumented population growth is much less than the number of apprehensions by DHS. Finally, the Appendix provides a detailed description of the CMS methodology.