Winnebago County, Illinois

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Winnebago County is a county located in the U.S. state of Illinois. As of 2000, the population was 278,418. Its county seat is Rockford, Illinois[1].

Winnebago County is part of the Rockford, Illinois, Metropolitan Statistical Area.



According to the U.S. Census Bureau, the county has a total area of 519 square miles (1,345 km²), of which 514 square miles (1,331 km²) is land and 6 square miles (14 km²) (1.07%) is water.

Major highways

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