Detroit
Not only is Michigan third highest in the nation for net migration losses, it also has this dubious distinction: 0.88% of the Great Lakes State's nearly 10 million residents left last year, the highest ratio in the nation.
The big problem, of course, is the ailing auto industry. Michigan's unemployment rate was the highest in the county in November, at 14.7%.
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Last updated December 28 2009: 3:56 PM ET
Source: Census Bureau population estimates, July 1, 2008 - July 1, 2009.