Winnebago County , Illinois

Winnebago County: County in Illinois, United States

Winnebago County locator map
Location of Winnebago County on Illinois map.

About

Winnebago County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 295,266 and a population density of 569 people per km². After 10 years in 2020 county had an estimated population of 281,295 inhabitants. Its county seat is Rockford. The county was created 185 years ago in 1836.

RockfordCityHall image
RockfordCityHall
RockfordCityHall image

Geography

Winnebago County is located at 42°20'11"N 89°9'39"W (42.3362600, -89.1608500). It has 6 neighbors: Boone County, DeKalb County, Ogle County, Stephenson County, Green County and Rock County.

Winnebago County map

The largest city of Winnebago County is Rockford with a population of 144,835. Other cities include, Loves Park population 23,382, South Beloit population 7,540, Winnebago population 2,973 and Pecatonica population 1,926. See all Winnebago County cities & populated places.

Winnebago County Quick Facts

Population : 281,295 (2020)
Country : United States of America
State : Illinois (United States)
Different from : Winnebago County, Winnebago County
Twitter username : winnebagoil
Area : 519 km2
Water as percent of area : 1.1%
Land as percent of area : 98.9%
Named for : Ho-Chunk
Altitude : 797 feet / 243 meters
Capital : Rockford
Establishment : January 01, 1836
Time Zone : America/Chicago
Local time : 11:51:43 (24th October 2021)
Density : 542 Pop. per km² as of 2020
Population growth : -4.97% (2010-2020)

Winnebago County has 6 neighbours.

  • Rockford

Demographics

According to census records, the population of Winnebago County decreased by 4.97% in 10 years.

Year Population % Change Method
2010 295,266 - census
2011 293,642 -0.55% estimation process
2012 292,084 -0.53% estimation process
2013 290,945 -0.39% estimation process
2014 288,695 -0.78% estimation process
2015 287,148 -0.54% estimation process
2016 286,065 -0.38% estimation process
2017 284,681 -0.49% estimation process
2018 283,630 -0.37% estimation process
2019 282,572 -0.37% estimation process
2020 281,295 -0.45% estimation process

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Other places with the same name (3)

Winnebago County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Winnebago County.

City Name Population Title
Rockford 144,835 County seat of Winnebago County, Illinois, United States
Loves Park 23,382 City north of Rockford, Illinois
Machesney Park 22,678 Village in the U.
Roscoe 10,406 Town
South Beloit 7,540 City in Winnebago County, Illinois, United States
Rockton 7,477 Illinois village near the Wisconsin border
Winnebago 2,973 City in Minnesota, United States
Cherry Valley 2,853 Township in Winnebago County, Illinois
Harlem 2,114 Township in Winnebago County, Illinois, United States
Lake Summerset 2,048 Census designated place
Pecatonica 1,926 City in Illinois, United States of America
Durand 1,387 Village in the United States
Shirland 944 Township in Winnebago County, Illinois
Seward 874 Human settlement in Illinois, United States of America
New Milford 851 Human settlement in Illinois, United States of America

Illinois Other Counties (more counties)

County Name Population Title
Cook County 5,108,284 County in Illinois, United States
Chicago 2,677,643 City and county seat of Cook County, Illinois, United States
DuPage County 917,481 County in Illinois, United States
Lake County 693,593 County in Oregon, United States
Will County 688,726 County in Illinois, United States
Kane County 531,010 County in southern Utah, United States
Markham 328,966 City in Cook County, Illinois, United States
McHenry County 305,888 County in Illinois, United States
Madison County 262,635 County in Montana, United States
Saint Clair County 258,046 The County of St.
Champaign County 209,192 County in Illinois, United States
Aurora 196,383 City in Kane County, Illinois, United States
Sangamon County 193,882 County in Illinois, United States
Peoria County 177,652 County in Illinois, United States of America
McLean County 171,256 County in North Dakota, United States
Naperville 147,986 City in DuPage and Will counties in Illinois, United States