Unauthorized Immigration/Irregular Migration
Explore all research, analysis, commentary, and data on unauthorized immigrants and irregular migrants, terms used in different parts of the world to describe the individuals who lack the right to reside legally in their country of destination, as well as the policies and enforcement practices affecting them.
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In Its Second Term, Trump Administration Quietly Expands Family Separation
Immigration enforcement during the second Trump term is driving a quieter, more diffuse wave of family separations inside the United States, often through detention, deportation, and pressures to depart the country voluntarily.
Following Years of High Border Arrivals, the U.S. Unauthorized Immigrant Population Hits New Peak
MPI estimates the U.S. unauthorized immigrant population reached a new peak of 15.8 million as of mid-2024, after holding steady at around 11 million throughout the 2010s.
A New Prime Minister, a New Deal: Time for an ambitious UK–EU pact on small boats
The arrival of a new UK Prime Minister offers a window to strike an ambitious UK-EU deal on Channel crossings, trading increased returns for humanitarian routes from Europe.
Mexican Immigrants in the United States
Mexicans remain the largest immigrant group in the United States, but their numbers have declined in recent years.
Los inmigrantes mexicanos en Estados Unidos
Los mexicanos siguen siendo el grupo de inmigrantes más numeroso de Estados Unidos, pero su número ha disminuido en los últimos años.
Spain and Latin America Take Diverging Paths on Regularization
Spain’s 2026 regularization drew nearly 1.2 million applications, even as many Latin American countries have pulled back from similar measures for Venezuelans.
España y América Latina siguen caminos divergentes en materia de regularización
El proceso de regularización de 2026 en España recibió cerca de 1,2 millones de solicitudes, aun cuando muchos países latinoamericanos han dado marcha atrás en medidas similares para los venezolanos.
