Immigration, Legal & Illegal
Census data can be used to track both migration within the U.S., and immigration to the U.S. The Census Bureau uses “native born” to refer to anyone born in the United States, Puerto Rico, a U.S. Island Area, or abroad of a U.S. citizen parent or parents.
Most common country of birth for foreign-born residents, excluding Mexico
With detailed maps of the Great Migration of African Americans from the South, 1900-1929.
The Great Migration of African Americans from the South
by Isabel Wilkerson