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 sq mi (1,344 km2)|
|• Land||513 sq mi (1,329 km2)|
|• Water||5.9 sq mi (15 km2), 1.1%|
|• Density||575/sq mi (222/km²)|
|Congressional districts||16th, 17th|
|Time zone||Central: UTC-6/-5|
Winnebago County is part of the Rockford, IL Metropolitan Statistical Area.
Climate and weather
|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.
- 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, 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:
- National Register of Historic Places listings in Winnebago County, Illinois
- Winnebago County War Memorial
- "State & County QuickFacts". United States Census Bureau. Retrieved July 9, 2014.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Monthly Averages for Rockford, Illinois". The Weather Channel. Retrieved 2011-01-27.
- "U.S. Decennial Census". United States Census Bureau. Retrieved July 9, 2014.
- "Historical Census Browser". University of Virginia Library. Retrieved July 9, 2014.
- "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 9, 2014.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. Retrieved July 9, 2014.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- 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|