According to the latest American Community Survey (a product of the U.S. Census Bureau, 2005-2007 data) three out of four of the U.S. born citizens of Wisconsin - 75.2 percent - were born in Wisconsin. By contrast, only 27.8 per cent of the U.S. born citizens of Nevada were born in their state of residence, the lowest percentage of all the 50 states. The state with the highest percentage of residents remaining in their native state is New York, at 82.1 percent. Michigan leads the Midwest at 80.6 percent and the Midwest leads the nation's regions at 70.3 percent of residents living in the states where they were born.
This information is available at http://factfinder.census.gov/servlet/DatasetMainPageServlet?_program=ACS&_submenuId=&_lang=en&_ts and then click on Geographic Comparison Tables
The survey is designed to provide the data communities need to see how they are changing--and, I presume, plan for the future. The data bear out that states, such as Florida and Arizona, with fewer native-born residents (41.4 and 41.7 percent, respectively) tend to have higher population growth rates. Note that the data is based on sampling and not a comprehensive census. If you break it down by Wisconsin county rather than state-by-state, Pierce County appears to have the lowest native-born population at 42.1 percent, while Kewaunee County has the highest at 88.9 percent. Vilas County is at 68.7percent , which is a number higher than I expected as it seems that just about everybody I meet is native to somewhere else, including me (Taylor County) and the wife (Illinois.) Among cities, Appleton has the highest percentage (78.1), while Madison has the lowest (63.3.)
This represents just one subset of the massive amount of available information. There is also housing, economic, and a myriad of other demographic statistics, enough to make your eyes glaze over should you decide to get into it.