Journal on Migration and Human Security, July 16, 2026, 32 pp.
Authors: Ryan Allen et al

This report estimates that the U.S. unauthorized immigrant population reached 13.7 million in mid-2023, an increase of 3 million since 2019 and the fastest growth since the early 2000s. Despite these large recent numbers, most of the unauthorized population are deeply rooted in the country: 80 percent have lived in the United States for at least five years, and 45 percent for 20 years or more. This population has also become more geographically and nationally diverse. Mexicans remained the largest group, accounting for 40 percent, down substantially from 62 percent in 2010. Much of the recent growth came from Central and South America, particularly Guatemala, Honduras, Venezuela, Colombia, and Ecuador. Half of unauthorized immigrants lived in California, Texas, Florida, or New York, although newer destinations such as Georgia and North Carolina have sizable populations. Unauthorized immigrants have extensive family ties to U.S. citizens and legal residents. Nearly 4.2 million were married to U.S. citizens or green-card holders, while 6.3 million children lived with at least one unauthorized parent; 5.3 million of these children were U.S. citizens. Overall, 14 million legally present people lived in households containing an unauthorized immigrant. Unauthorized immigrants also play a significant economic role. About 9.6 million were in the labor force, with 94 percent employed, particularly in construction, food services, landscaping, and agriculture. MPI also estimates that roughly 4 million—29 percent—held some form of temporary or “liminal” protection, including TPS, DACA, pending asylum, or humanitarian parole, illustrating the increasingly complex legal circumstances of this population.