Bradford County . They represent 26 percent of the total foreign-born population., Urban Institute, Undocumented Immigrants: Facts and Figures, urban.org, Jan. 12, 2004, In the case of the total unauthorized population, we estimate that the size of this group in mid-2001 varies from a low of about 5.9 million to a high of about 9.9 million, with a mid-range estimate of about 7.8 million. Border Patrol apprehensions of migrants at the U.S.-Mexico border are on the rise again. 2020 estimates are not yet available from DHS. This material may not be published, broadcast, rewritten, Estimated Undocumented Immigrants by State Illegal aliens, undocumented immigrants, or unauthorized residents, no matter which term is used, all refer to people who live in the United States but do not have proper government authorization. Pottawattamie County, Amherst [4] FAIR Research Team, 2021 Year in Review: Bidens Immigration Numbers Reveal Record Failures, Costs and to Americans, Federation for American Immigration Reform, December 2021, https://www.fairus.org/issue/border-security/2021-year-review-biden-immigration-numbers-record-failures-costs.