Rockford is a city in Winnebago County in the U.S. state of Illinois, in far northern Illinois. Located 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 third-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. The City of Rockford's population is 147,051...
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