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Early ghettos

The development of ghettos in the United States is closely associated with different waves of immigration and internal urban migration. The Irish and German immigrants of the mid-19th century were the first ethnic groups to form ethnic enclaves in United States cities. This was followed by large numbers of immigrants from Southern and Eastern Europe, including many Italians and Poles and Russians between 1880 and 1920. Jewish immigrants were part of the earliest German wave, as well as comprising numerous immigrants from Eastern Europe, the Russian Empire at the time. Most remained in their established immigrant communities, but by the second or third generation, many families were able to relocate to newer housing built in the suburbs after World War II.

These ethnic ghetto areas included the Lower East Side in Manhattan, New York, which later became notable as predominantly Jewish, and later still as Chinese and Latino. East Harlem was once predominantly Italian and in the 1950s became home to a large Puerto Rican community. Little Italys across the country were predominantly Italian ghettos. Many Polish immigrants settled in areas of other nationals, such as Pilsen of Chicago and Polish Hill of Pittsburgh. Since the late 20th century, Brighton Beach in Brooklyn has become the home of predominately Jewish Russian and Ukrainian immigrants, who left after the Soviet Union lifted some migration restrictions and later after its fall.