Winnebago County, Illinois

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Winnebago County
City Hall in Rockford, Illinois.
City Hall in Rockford, Illinois.
Map of Illinois highlighting Winnebago County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 42°20′N 89°10′W / 42.33°N 89.16°W / 42.33; -89.16
Country United States
State Illinois
FoundedJanuary 16, 1836
Named forWinnebago Tribe
Largest cityRockford
 • Total519 sq mi (1,340 km2)
 • Land513 sq mi (1,330 km2)
 • Water5.9 sq mi (15 km2)  1.1%
 • Total285,350
 • Density550/sq mi (210/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)

Winnebago County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 285,350,[1] making it the seventh most populous county in Illinois. Its county seat is Rockford.[2]

Winnebago County was founded on January 16, 1836 and named for the Winnebago Tribe of American Indians.

References[change | change source]

  1. 1.0 1.1 "QuickFacts: Winnebago County, Illinois". United States Census Bureau. Retrieved August 14, 2023.
  2. "Find a County". National Association of Counties. Retrieved 2011-06-07.