Winnebago County, Illinois
||This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. (April 2009)|
|Winnebago County, Illinois|
Location in the state of Illinois
Illinois's location in the U.S.
|Founded||January 16, 1836|
|Named for||Winnebago Tribe|
|• Total||519.25 sq mi (1,345 km2)|
|• Land||513.36 sq mi (1,330 km2)|
|• Water||5.89 sq mi (15 km2), 1.13%|
|• Density||541/sq mi (209/km²)|
|Congressional districts||16th, 17th|
|Time zone||Central: UTC-6/-5|
Winnebago County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 295,266, which is an increase of 6.1% from 278,418 in 2000.1 Its county seat is Rockford.2
Winnebago County is part of the Rockford, Illinois, Metropolitan Statistical Area.
According to the 2010 census, the county has a total area of 519.25 square miles (1,344.9 km2), of which 513.36 square miles (1,329.6 km2) (or 98.87%) is land and 5.89 square miles (15.3 km2) (or 1.13%) is water.3
- Interstate 39
- Interstate 90
- U.S. Highway 20
- U.S. Highway 51
- Illinois Route 2
- Illinois Route 70
- Illinois Route 75
- Illinois Route 173
- Illinois Route 251
- Rock County, Wisconsin (north)
- Boone County (east)
- DeKalb County (southeast)
- Ogle County (south)
- Stephenson County (west)
- Green County, Wisconsin (northwest)
As of the census of 2000,6 there were 296,266 people, 111,765 households, and 76,372 families residing in the county. The population density was 542 people per square mile (209/km²). There were 114,404 housing units at an average density of 223 per square mile (86/km²). The racial makeup of the county was 77.51% White, 12.2% Black or African American, 0.4% Native American, 2.5% Asian, 0.04% Pacific Islander, 3.11% from other races, and 2.86% from two or more races. 10.90% of the population were Hispanic or Latino of any race. 20.8% were of German, 9.2% Swedish, 8.9% Irish, 7.3% Italian, 6.6% English and 6.1% American ancestry.
There were 111,765 households out of which 32.90% had children under the age of 18 living with them, 52.30% were married couples living together, 11.80% had a female householder with no husband present, and 31.80% were non-families. 26.30% of all households were made up of individuals and 9.60% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.06.
In the county the population was spread out with 26.40% under the age of 18, 8.40% from 18 to 24, 29.80% from 25 to 44, 22.70% from 45 to 64, and 12.70% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 95.80 males. For every 100 females age 18 and over, there were 92.60 males.
The median income for a household in the county was $43,886, and the median income for a family was $52,456. Males had a median income of $40,289 versus $25,942 for females. The per capita income for the county was $21,194. About 6.90% of families and 9.60% of the population were below the poverty line, including 12.90% of those under age 18 and 6.80% of those age 65 or over.
Winnebago County is comprised by the following districts represented in 2009-2010 by the following individuals listed along with their political affiliation :
- Randal Olson (R)
- Tom Owens (R)
- Steve Schultz (R)
- David Yeske (R)
- Doug Aurand (D)
- Kyle Logan (R)
- Dave Fiduccia (R)
- Dianne Parvin (R)
- Paul Gorski (D)
- Wendy Owano (R) 
- Pearl Hawks (D)
- Dorothy Redd (D)
- Angie Goral (D)
- Dave Tassoni (D)
- Kay Mullins (R)
- Melvin Paris (D)
- Ted Biondo (R)
- Fred Wescott (R)
- John Eckberg (R)
- Bob Kinnison (R)
- Isidro Barrios (D) 
- Karen Hoffman (D)
- George Anne Duckett (D)
- L.C. Wilson (D)
- Bob Hastings (D)
- Rick Pollack (R)
- Frank Gambino (R)
- John Sweeney (R)
Winnebago County is divided into these townships:
|Climate chart (explanation)|
In recent years, average temperatures in the county seat of Rockford have ranged from a low of 11 °F (−12 °C) in January to a high of 83 °F (28 °C) in July, although a record low of −27 °F (−33 °C) was recorded in January 1982 and a record high of 112 °F (44 °C) was recorded in July 1936. Average monthly precipitation ranged from 1.34 inches (34 mm) in February to 4.80 inches (122 mm) in June.7
- National Register of Historic Places listings in Winnebago County, Illinois
- Winnebago County War Memorial
- "Winnebago County QuickFacts". United States Census Bureau. Retrieved 2011-11-05.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "Census 2010 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-11-05.
- "U.S. Decennial Census". Census.gov. Retrieved July 28, 2013.
- "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2012". Census.gov. Retrieved July 28, 2013.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "Monthly Averages for Rockford, Illinois". The Weather Channel. Retrieved 2011-01-27.
- Shaw, Adele Marie (June 1904). "Common-Sense Country Schools: How Superintendent kern Has Revolutionized Rural Education In Winnebago County, Illinois". The World's Work: A History of Our Time VIII: 4883–4894. Retrieved 2009-07-10. Includes numerous photos of c. 1904 Winnebago County schools.
||Green County, Wisconsin||Rock County, Wisconsin|
|Stephenson County||Boone County|
|Ogle County||DeKalb County|