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About Rockford

Rockford is a city in Winnebago County, Illinois, located in the far northern part of the state. Situated on the banks of the Rock River, Rockford is the county seat of Winnebago County (a small portion of the city is located in Ogle County). The largest city in Illinois outside of the Chicago metropolitan area, Rockford is the fourth-largest city in the state and the 171st most populous in the United States. According to 2010 U.S. Census data, the City of Rockford had a population of 152,871, with an outlying metropolitan area population of 348,360. Rockford's population was 145,609 as of 2019, down 5.0% since 2010.Settled in the mid-1830s, the position of the city on the Rock River made its location strategic for industrial development.