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Rockford metropolitan area, Illinois
Combined Statistical Area in Illinois, United States / From Wikipedia, the free encyclopedia
The Rockford Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of four counties in north-central Illinois, anchored by the city of Rockford. As of the 2010 census, the MSA had a population of 349,431 (though a 2011 estimate placed the population at 348,360).[1] The Rockford MSA abuts the southern portions of the Janesville-Beloit MSA and the Chicago MSA. It forms the main part of the larger Rockford–Freeport–Rochelle Combined Statistical Area (est. pop. 455,595).