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	Average max. and min. temperatures in °F
	Precipitation totals in inches
	Source: The Weather Channel

; Rockford, Illinois;
Climate chart (explanation)
	Average max. and min. temperatures in °F
	Precipitation totals in inches
	Source: The Weather Channel
Metric conversion
	Average max. and min. temperatures in °C
	Precipitation totals in mm

Winnebago County
; Winnebago County, Illinois;
	; City Hall in Rockford, Illinois.;
	; ; Seal;
	; ; Seal;
	; ; Location in the U.S. state of Illinois;
	; ; Illinois's location in the U.S.;
Founded	January 16, 1836
Named for	Winnebago Tribe
Seat	Rockford
Largest city	Rockford
Area
• Total	519 sq mi (1,344 km2)
• Land	513 sq mi (1,329 km2)
• Water	5.9 sq mi (15 km2), 1.1%
Population
• (2010)	295,266
• Density	575/sq mi (222/km2)
Congressional districts	; 16th, 17th;
Time zone	; Central: UTC−6/−5;
Website	www.wincoil.us

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,^[1] making it the seventh most populous county in Illinois behind Cook County and its five surrounding collar counties. Its county seat is Rockford.^[2]

Winnebago County is the central county of the Rockford Metropolitan Statistical Area.

History

Winnebago County was formed on January 16, 1836 out of Jo Daviess and LaSalle counties. It was named for the Winnebago Tribe of American Indians. At the time the county was founded its inhabitants consisted almost entirely of New Englanders and New England transplants from upstate New York.^[3] These were "Yankee" settlers, meaning they were descended from the English Puritans who settled New England during the early 1600s. They made up virtually all of Winnebago County's inhabitants during the first several decades of its history. In this regard the county was similar to most of the northern portion of the state of Illinois, and almost all of the neighboring state of Wisconsin. After the conclusion of the Black Hawk War there was an additional surge of immigration from New England. As a result of this heritage the inhabitants of Winnebago County considered themselves, and functioned as, a cultural expansion of early New England culture.^[4] In the Presidential election of 1860, Abraham Lincoln won 3,985 votes in Winnebago County, whereas Steven Douglas only won 817 votes.^[5]

Winnebago County for its first year of existence

Winnebago County in 1837, reduced to its current borders by the creation of Stephenson and Boone Counties

Geography

According to the U.S. Census Bureau, the county has a total area of 519 square miles (1,340 km²), of which 513 square miles (1,330 km²) is land and 5.9 square miles (15 km²) (1.1%) is water.^[6]

Climate and weather

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]

Major highways

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

Adjacent counties

Rock County, Wisconsin (north)

Boone County (east)

DeKalb County (southeast)

Ogle County (south)

Stephenson County (west)

Green County, Wisconsin (northwest)

Demographics

Historical population
Census	Pop.		%±
1840	4,609		—
1850	11,773		155.4%
1860	24,491		108.0%
1870	29,301		19.6%
1880	30,505		4.1%
1890	39,938		30.9%
1900	47,845		19.8%
1910	63,153		32.0%
1920	90,929		44.0%
1930	117,373		29.1%
1940	121,178		3.2%
1950	152,385		25.8%
1960	209,765		37.7%
1970	246,623		17.6%
1980	250,884		1.7%
1990	252,913		0.8%
2000	278,418		10.1%
2010	295,266		6.1%
Est. 2017	284,778	^[8]	−3.6%
U.S. Decennial Census^[9] 1790-1960^[10] 1900-1990^[11] 1990-2000^[12] 2010-2013^[1]

As of the 2010 United States Census, there were 295,266 people, 115,501 households, and 76,854 families residing in the county.^[13] 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).^[6] 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.^[13] 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.^[14]

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.^[13]

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.^[15]

Winnebago County is comprised by the following districts represented in 2015-2016 by the following individuals listed along with their political affiliation:
^[16]

District 1
Faye Lyon (R)

District 2
Jim Webster (R)

District 3
Steve Schultz (R)

District 4
David Boomer (R)

District 5
Dave Tassoni (D)

District 6
Kieth McDonald (R)

District 7
Gary Jury (R)

District 8
Eli Nicolosi (R)

District 9
Dave Kelley (R)

District 10
Joe Hoffman (D)

District 11
Dave Fiduccia (R)

District 12
Julio Salgado (D)

District 13
Angie Goral (D)

District 14
L.C. Wilson (D)

District 15
Burt Gerl (D)

District 16
John F. Sweeney (R)

District 17
Fred Wescott (R)

District 18
Dorothy Redd (D)

District 19
John Guevara (R)

District 20
Ted Biondo (R)

Communities

Cities

Loves Park

Rockford

South Beloit

Villages

Cherry Valley

Durand

Machesney Park

New Milford

Pecatonica

Rockton

Roscoe

Winnebago

Census-designated place

Lake Summerset

Unincorporated communities

Alworth

Argyle‡

Harrison

Seward

Shirland

Wempletown

Townships

Winnebago County is divided into these townships:

Burritt

Cherry Valley

Durand

Harlem

Harrison

Laona

Owen

Pecatonica

Rockford

Rockton

Roscoe

Seward

Shirland

Winnebago

Politics

**Presidential Elections Results**^[17]
Year	Republican	Democratic	Third Parties
2016	46.3% 55,624	46.4% 55,713	7.3% 8,718
2012	46.2% 55,138	51.7% 61,732	2.1% 2,527
2008	42.5% 53,886	55.3% 70,034	2.2% 2,784
2004	50.1% 60,782	49.2% 59,740	0.7% 903
2000	49.2% 53,816	47.6% 51,981	3.2% 3,500
1996	44.5% 44,479	46.3% 46,264	9.2% 9,167
1992	37.6% 42,221	43.0% 48,298	19.3% 21,696
1988	54.9% 55,699	44.6% 45,280	0.6% 571
1984	58.7% 64,203	40.8% 44,629	0.6% 619
1980	46.5% 48,825	30.8% 32,384	22.7% 23,880
1976	54.2% 52,736	43.5% 42,399	2.3% 2,252
1972	61.5% 57,682	38.3% 35,937	0.3% 231
1968	52.5% 47,646	40.5% 36,702	7.1% 6,391
1964	45.0% 39,920	55.0% 48,834	0.0% 0
1960	55.2% 49,541	44.7% 40,090	0.1% 110
1956	62.4% 48,332	37.5% 29,063	0.1% 89
1952	58.0% 43,468	41.9% 31,409	0.2% 127
1948	51.5% 29,537	47.4% 27,145	1.1% 631
1944	52.3% 30,837	47.2% 27,831	0.5% 277
1940	51.9% 30,683	47.5% 28,061	0.7% 383
1936	46.3% 24,997	50.4% 27,200	3.3% 1,792
1932	57.1% 26,632	38.0% 17,707	4.9% 2,286
1928	80.4% 33,258	18.6% 7,684	1.0% 430
1924	71.3% 21,978	7.2% 2,228	21.4% 6,608
1920	79.2% 19,913	13.4% 3,355	7.4% 1,866
1916	65.0% 14,893	27.1% 6,198	7.9% 1,806
1912	54.1% 7,089	17.4% 2,276	28.5% 3,740
1908	71.5% 8,919	17.4% 2,163	11.1% 1,385
1904	74.8% 8,143	10.8% 1,177	14.4% 1,567
1900	72.7% 8,103	22.4% 2,498	4.9% 546
1896	75.1% 8,242	22.3% 2,447	2.6% 286
1892	62.5% 5,854	28.1% 2,634	9.4% 878

References

Specific

^ ^a^b "State & County QuickFacts". United States Census Bureau. Retrieved July 9, 2014..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

^ "Find a County". National Association of Counties. Retrieved 2011-06-07.

^ History of Rockford and Winnebago County, Illinois: From the First Settlement in 1834 to the Civil War pg. 253

^ The Expansion of New England: The Spread of New England Settlement and Institutions to the Mississippi River, 1620-1865 by Lois imball Mathews pg. 210-212

^ History of Rockford and Winnebago County, Illinois: From the First Settlement in 1834 to the Civil War, pg. 379

^ ^a^b "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2015-07-12.

^ ^a^b "Monthly Averages for Rockford, Illinois". The Weather Channel. Retrieved 2011-01-27.

^ "Population and Housing Unit Estimates". Retrieved April 8, 2018.

^ "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.

^ ^a^b^c "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.

^ "County Board Office: County Board Members - Winnebago County, Illinois". wincoil.us. Retrieved 19 March 2018.

^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 19 March 2018.

General

U.S. Geological Survey Geographic Names Information System: Winnebago County, Illinois

External links

Official website

Winnebago County Genealogy

History of Winnebago County

Coordinates: 42°20′11″N 89°09′39″W / 42.33639°N 89.16083°W / 42.33639; -89.16083

[QF-1] "State & County QuickFacts". United States Census Bureau. Retrieved July 9, 2014..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

[GR6-2] "Find a County". National Association of Counties. Retrieved 2011-06-07.

[3] History of Rockford and Winnebago County, Illinois: From the First Settlement in 1834 to the Civil War pg. 253

[4] The Expansion of New England: The Spread of New England Settlement and Institutions to the Mississippi River, 1620-1865 by Lois imball Mathews pg. 210-212

[5] History of Rockford and Winnebago County, Illinois: From the First Settlement in 1834 to the Civil War, pg. 379

[census-density-6] "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2015-07-12.

[weather-7] "Monthly Averages for Rockford, Illinois". The Weather Channel. Retrieved 2011-01-27.

[USCensusEst2017-8] "Population and Housing Unit Estimates". Retrieved April 8, 2018.

[9] "U.S. Decennial Census". United States Census Bureau. Retrieved July 9, 2014.

[10] "Historical Census Browser". University of Virginia Library. Retrieved July 9, 2014.

[11] "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 9, 2014.

[12] "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 9, 2014.

[census-dp1-13] "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Retrieved 2015-07-12.

[census-dp2-14] "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-12.

[census-dp3-15] "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-12.

[16] "County Board Office: County Board Members - Winnebago County, Illinois". wincoil.us. Retrieved 19 March 2018.

[17] Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 19 March 2018.

v t e Municipalities and communities of Winnebago County, Illinois, United States
County seat: Rockford
Cities	Loves Park‡ Rockford South Beloit
Villages	Cherry Valley‡ Durand Machesney Park New Milford Pecatonica Rockton Roscoe Winnebago
CDP	Lake Summerset‡
Townships	Burritt Cherry Valley Durand Harlem Harrison Laona Owen Pecatonica Rockford Rockton Roscoe Seward Shirland Winnebago
Unincorporated communities	Alworth Argyle‡ Harlem Harrison Kishwaukee Latham Park Seward Shirland Wempletown Westfield Corners
Footnotes	‡This populated place also has portions in an adjacent county or counties

v t e State of Illinois
Springfield (capital)
Topics	Index Buildings and structures Census areas Communications Culture Delegations Earthquakes Economy Education Energy Environment Geography Government Health History Languages Law Music People Politics Portal Protected areas Society Sports Tourism Transportation Windmills	Seal of Illinois
Regions	American Bottom Central Illinois Champaign–Urbana metropolitan area Chicago metropolitan area Collar counties Corn Belt Driftless Area Forgottonia Fox Valley Illinois-Indiana-Kentucky tri-state area Metro East Metro Lakeland Mississippi Alluvial Plain North Shore Northern Illinois Northwestern Illinois Peoria metropolitan area Quad Cities River Bend Rockford metropolitan area Southern Illinois Streatorland Wabash Valley
Cities, towns and villages	Alton/Granite City/Edwardsville Arlington Heights/Palatine Aurora/Naperville/Oswego/Plainfield Bartlett/Hanover Park/Streamwood Belleville/East St. Louis/Collinsville/O'Fallon Berwyn/Cicero Bloomington/Normal Bolingbrook/Romeoville Buffalo Grove/Wheeling Calumet City Canton Carbondale Carol Stream/Glendale Heights Centralia Champaign/Urbana Charleston/Mattoon Chicago Chicago Heights Crystal Lake/Algonquin Danville Decatur DeKalb/Sycamore Des Plaines/Mount Prospect/Park Ridge Dixon Downers Grove/Woodridge Effingham Elgin/Carpentersville Elmhurst/Lombard/Addison Evanston/Skokie Freeport Galesburg Glenview/Northbrook Harrisburg Jacksonville Joliet Kankakee/Bradley/Bourbonnais Lincoln Macomb Marion/Herrin Moline/East Moline/Rock Island Mount Vernon Mundelein Oak Lawn Oak Park Orland Park/Tinley Park Ottawa/Streator/LaSalle/Peru Peoria/Pekin/East Peoria/Morton/Washington Pontiac Quincy Rochelle Rockford/Belvidere/Machesney Park/Loves Park St. Charles Schaumburg/Hoffman Estates/Elk Grove Village Springfield Sterling/Rock Falls Taylorville Waukegan/North Chicago/Gurnee Wheaton
Counties	Adams Alexander Bond Boone Brown Bureau Calhoun Carroll Cass Champaign Christian Clark Clay Clinton Coles Cook Crawford Cumberland DeKalb DeWitt Douglas DuPage Edgar Edwards Effingham Fayette Ford Franklin Fulton Gallatin Greene Grundy Hamilton Hancock Hardin Henderson Henry Iroquois Jackson Jasper Jefferson Jersey Jo Daviess Johnson Kane Kankakee Kendall Knox LaSalle Lake Lawrence Lee Livingston Logan Macon Macoupin Madison Marion Marshall Mason Massac McDonough McHenry McLean Menard Mercer Monroe Montgomery Morgan Moultrie Ogle Peoria Perry Piatt Pike Pope Pulaski Putnam Randolph Richland Rock Island Saline Sangamon Schuyler Scott Shelby St. Clair Stark Stephenson Tazewell Union Vermilion Wabash Warren Washington Wayne White Whiteside Will Williamson Winnebago Woodford

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