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).
Unauthorized immigrants account for about one-in-four foreign-born U.S. residents. They make up a somewhat higher share of immigrants in the Houston (37%), Dallas (37%), Atlanta (33%), Phoenix (37%), Las Vegas (35%), Denver (37%) and Austin (34%) metro areas. They make up a somewhat lower share of all immigrants in the New York (19%), Miami (18%), San Francisco (17%) and San Jose (17%) metro areas.