"The analysis shows that the nation’s unauthorized immigrant population is highly concentrated, more so than the U.S. population overall. In 2014, the 20 metro areas with most unauthorized immigrants were home to 6.8 million of them, or 61% of the estimated nationwide total. By contrast, only 36% of the total U.S. population lived in those metro areas.
But the analysis also shows that unauthorized immigrants tend to live where other immigrants live. Among lawful immigrants – including naturalized citizens and noncitizens – 65% lived in those top metros.
By far the biggest unauthorized immigrant populations were in the New York and Los Angeles metro areas (1.2 million and 1 million, respectively). No other metro area approached a million. Among the top 20 areas, the smallest unauthorized immigrant populations included Orlando (110,000) and Austin (100,000).