U.S. illegal immigrant count hits historic high during Biden's final year
A Migration Policy Institute study estimates that about 15.8 million people were living in the United States without authorization by mid-2024, the highest figure on record.
According to a new report from the Migration Policy Institute, the United States housed an estimated 15.8 million unauthorized immigrants by mid-2024, surpassing any previous count. This surge reflects a jump from the stable 11 million level seen throughout the 2010s, driven largely by unprecedented border arrivals and the Biden administration's broad application of humanitarian parole programs. MPI finds that roughly four in ten of these individuals are in a temporary legal limbo, protected by measures such as Temporary Protected Status, Deferred Action for Childhood Arrivals, or pending asylum claims.
The study attributes the rise to a robust post-pandemic economy and large-scale displacement across Central and South America caused by gang violence, political repression, and economic strain. While Mexican nationals remain the largest nationality group, migrants from other American nations have increased sharply. The report does not assess the impact of policy shifts between administrations, leaving that analysis to other commentators.
Why it matters
The record number of undocumented residents influences immigration policy, resource allocation, and political debates across the U.S.
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