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The nation’s foreign-born population has become more dispersed since 1990, but the Southwest region and large cities continue to have the highest concentrations of immigrants. As of 2018, 19% of the national immigrant population lives in the top five counties: Los Angeles County, California; Miami-Dade County, Florida; Harris County, Texas; Cook County, Illinois; and Queens County, New York. In comparison, 30% of the nation’s immigrant population in 1990 lived in the top five counties at the time.

Percent foreign born, by county, 1990
Percent foreign born, by county, 2000
Percent foreign born, by county, 2006-2010
Percent foreign born, by county, 2012-2016
Percent foreign born, by county, 2014-2018