U.K. and Germany host most illegal migrants among European countries

There were between 3.9 million to 4.8 million unauthorized immigrants living in Europe as of 2017, according to new analysis from Pew.

The flipside: The study shows virtually no illegal immigration to countries like Hungary and Poland, where political leaders have seized upon widespread antipathy to immigration.

By the numbers: Most unauthorized immigrants in Europe lived in Germany (1 million–1.2 million), the U.K. (800,000–1.2 million), Italy (500,000–700,000) or France (300,000–400,000).

• Unauthorized immigrants account for no more than 2%, and in most cases less than 1%, of populations in countries across Europe.

In the U.S., meanwhile, Pew's estimate as of 2017 is 10.5 million unauthorized immigrants, or 3.2% of the total population.

• While nearly half in the U.S. hail from Mexico, that's only the case for 20% of those arriving in the last five years, with similar numbers coming from Northern Triangle countries (17%) and countries in Asia (23%).

Regional breakdown across Europe: Asia-Pacific (30%), within Europe (23%), Middle East/North Africa (21%), sub-Saharan Africa (17%), the Americas (8%).

• The numbers skew higher for Middle East/North Africa (30%) in Germany and Asia-Pacific (52%) in the U.K.
• The deaths of 39 Vietnamese people in the back of a truck last month focused attention on migration from that country to the U.K.

Go deeper: Why the migrant crisis is happening now