A new Pew Research Center analysis estimates that at least 3.9 million unauthorized immigrants – and possibly as many as 4.8 million – lived in Europe in 2017. Learn how we conducted the first comprehensive estimate of Europe’s unauthorized immigrant population in over a decade.

Blog Post: Q&A: How Pew Research Center estimated the number of unauthorized immigrants in Europe
Report: Europe’s Unauthorized Immigrant Population Peaks in 2016, Then Levels Off