The US Census recently released data on county-by-county migration flows. The tables that can be downloaded are huge but here is a look at the flows in and out of DuPage County:

Looks like a lot of movement to (and some from) warmer locales – southern California, Arizona, Florida – and lots of movement in the Midwest in an area roughly bounded by St. Louis, Detroit, and Minneapolis. You can also look at the migrations by education or income level.

Very cool all around. There is a lot of data to crunch here and these visualizations help make sense of a lot of data. At the same time, these aren’t necessarily huge movements of people. Take Harris County, home to Houston (4th largest city in the United States): over this five year span, there was a +88 flow from Harris to DuPage County.