The best of the best: the portal for top lists & rankings: Strategy and business building for the data-driven economy: California and Texas are the states hosting the biggest populations of undocumented immigrants in the U.S., according to estimates by Pew Research Center. Former Border Patrol Chief Ron Vitiello on migrants risking deadly heat to cross into the US and slams the Biden administration for incentivizing illegal crossings. Delaware County [2] Bob Dane, Mayorkas Does Congress Work, Issues More Cheap Labor Visas, ImmigrationReform.com, March 18, 2022, https://www.immigrationreform.com/2022/03/18/dhs-again-raises-foreign-worker-cap-immigrationreform-com/. [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. Although illegal immigration has been a concern since the introduction of immigration curbs in 1875, deliberate attempts to estimate the population size reliably were not made until the 1970s., US General Accounting Office, Report to the Chairman of the Subcommittee on Immigration and Refugee Policy of the Committee on the Judiciary United States Senate: Problems and Options in Estimating the Size of the Illegal Alien Population, gao.gov, Sep. 1982. Pew Research Center estimates that 10.7 million unauthorized immigrants, the lowest level in a decade, lived in the U.S. in 2016. [9] Stephen Dinan, Joe Biden Border Wall Halt Creates Smugglers Highway, Sheriff Says, The Washington Times, March 3, 2021, https://www.washingtontimes.com/news/2021/mar/3/joe-biden-border-wall-halt-creates-smugglers-highw/. The estimated size and growth of the illegal immigrant population are important because, unlike border apprehension figures, the number of illegal immigrants living in the country is what ultimately determines their impact. Chesterfield County *3,000,000 is the average between the 2 and 4 million reposted by Warren and Passel below. Franklin County Watsonville, Arapahoe County Which topics are covered by the "Chart of the Day"? //-->