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Index/Topics/European-born undocumented immigrants in the U.S. 2023-2025

European-born undocumented immigrants in the U.S. 2023-2025

Estimates of European-born undocumented immigrants in the U.S. using different data sources and methods

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Jan 16, 2026
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How many undocumented immigrants originate from European countries?

Estimates suggest a relatively small minority of the U.S. unauthorized/undocumented population was born in Europe — on the order of a few hundred thousand people — but precise counts vary by data sour...

Jan 18, 2026

What methodologies do researchers use to estimate the unauthorized immigrant population, and how do their results differ?

Three families of methods dominate efforts to count the U.S. unauthorized immigrant population: the residual estimation approach that subtracts estimated lawful immigrants from total foreign‑born coun...