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 a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 295,266, making it the seventh most populous county in Illinois behind Cook County and its five surrounding collar counties. Its county seat is Rockford.
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)
|U.S. Decennial Census
As of the 2010 United States Census, there were 295,266 people, 115,501 households, and 76,854 families residing in the county. The population density was 575.2 inhabitants per square mile (222.1/km2). There were 125,965 housing units at an average density of 245.4 per square mile (94.7/km2). The racial makeup of the county was 77.4% white, 12.2% black or African American, 2.3% Asian, 0.3% American Indian, 4.9% from other races, and 2.8% from two or more races. Those of Hispanic or Latino origin made up 10.9% of the population. In terms of ancestry, 25.6% were German, 13.5% were Irish, 9.4% were American, 8.7% were Swedish, 8.3% were English, and 7.4% were Italian.
Of the 115,501 households, 33.1% had children under the age of 18 living with them, 47.3% were married couples living together, 14.0% had a female householder with no husband present, 33.5% were non-families, and 27.7% of all households were made up of individuals. The average household size was 2.52 and the average family size was 3.07. The median age was 38.3 years.
The median income for a household in the county was $47,198 and the median income for a family was $59,814. Males had a median income of $48,358 versus $32,103 for females. The per capita income for the county was $24,008. About 11.5% of families and 15.9% of the population were below the poverty line, including 25.0% of those under age 18 and 7.5% 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.
- "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2015-07-12.
- "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" (PDF). United States Census Bureau. Retrieved July 9, 2014.
- "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Retrieved 2015-07-12.
- "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-12.
- "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-12.
- 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|