Winnebago County, Illinois Population 2021

Winnebago County, Illinois's estimated population is 280,456 with a growth rate of -0.38% in the past year according to the most recent United States census data. Winnebago County, Illinois is the 8th largest county in Illinois. The 2010 Population was 295,083 and has seen a growth of -4.96% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021280,456-1,058-0.38%
2020281,514-1,058-0.37%
2019282,572-1,058-0.37%
2018283,630-1,051-0.37%
2017284,681-1,384-0.48%
2016286,065-1,083-0.38%
2015287,148-1,547-0.54%
2014288,695-2,250-0.77%
2013290,945-1,139-0.39%
2012292,084-1,558-0.53%
2011293,642-1,441-0.49%
2010295,08342,17016.67%
1990252,9132,0290.81%
1980250,8844,2611.73%
1970246,62336,85817.57%
1960209,76557,38037.65%
1950152,38531,20725.75%
1940121,1783,8053.24%
1930117,37326,44429.08%
192090,92927,77643.98%
191063,15315,30831.99%
190047,8457,90719.80%
189039,9389,43330.92%
188030,5051,2044.11%
187029,3014,81019.64%
186024,49112,718108.03%
185011,7737,164155.44%
18404,6090.00%
2021 Growth Rate
-0.38%
County Website
Founded
January 16, 1836
County Seat
2010 Population
295,083
Growth Since 2010
-4.96%
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Winnebago County, Illinois Population Growth

Population by Race

Race Population Percentage
White224,36378.77%
Black or African American36,93512.97%
Two or More Races9,4603.32%
Asian7,5302.64%
Some Other Race5,6561.99%
American Indian and Alaska Native8310.29%
Native Hawaiian and Other Pacific Islander440.02%
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Winnebago County, Illinois Population by Race

Winnebago County, Illinois Population Pyramid $2021

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Winnebago County, Illinois Median Age

39.7


Total

38.4


Male

40.8


Female

Winnebago County, Illinois Adults

There are 217,729 adults, (48,452 of whom are seniors) in Winnebago County, Illinois.

Winnebago County, Illinois Age Dependency

68.3

Age Dependency Ratio

28.6

Old Age Dependency Ratio

39.6

Child Dependency Ratio

Winnebago County, Illinois Sex Ratio

Female

145,780

51.18%

Male

139,039

48.82%

Winnebago County, Illinois Population by Age

Winnebago County, Illinois Renter vs Owner Occupied by Household Type

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Winnebago County, Illinois Household Types

Type Owner Renter
Married85%15%
All65.9%34.1%
Male55.3%44.7%
Non Family53.5%46.5%
Female40.4%59.6%

65.9%

Rate of Home Ownership

Winnebago County, Illinois Households and Families

Type Count Average Size Owned
All114,7792.4465.9
Married51,4643.0785
Non Family40,8801.1953.5
Female16,3243.2840.4
Male6,1113.3855.3

3.03

Average Family Size

2.44

Average Household Size

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Winnebago County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade7,9614.10%
9th to 12th Grade15,9538.22%
High School Graduate61,56831.74%
Some College46,62324.03%
Associates Degree17,5139.03%
Bachelors Degree28,07614.47%
Graduate Degree16,2888.40%
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Winnebago County, Illinois Educational Attainment by Sex (over 25)

Winnebago County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White146,772134,50536,371
Black21,70917,8723,365
Hispanic18,02411,4111,581
Asian4,9994,1752,516
Other Race3,0411,640386
2+ Races2,9152,397531
Native American59949556
Islander24243

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 50.33%.

Winnebago County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$36,631$44,386$29,994
Less Than 9th Grade$21,289$27,047$15,911
High School Graduate$30,334$37,728$24,467
Some College$35,634$46,748$28,692
Bachelors Degree$51,502$63,643$43,978
Graduate Degree$67,394$76,569$61,530

$36,631

Average Earnings

$44,386

Average Male

$29,994

Average Female

Winnebago County, Illinois Earnings by Educational Attainment

Winnebago County, Illinois Language by Age

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Winnebago County, Illinois Language

85.28% of Winnebago County, Illinois residents speak only English, while 14.72% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 9.97% of the population.

Winnebago County, Illinois Language

Winnebago County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White193,47018,5869.61%
Black36,13913,28736.77%
Hispanic35,9128,99825.06%
Multiple9,0712,43226.81%
Asian7,4961,11914.93%
Other5,6331,04018.46%
Native78825432.23%
Islander432251.16%

15.56%

Overall Poverty Rate

14.08%

Male Poverty Rate

16.96%

Female Poverty Rate

Poverty in Winnebago County, Illinois

The race most likely to be in poverty in Winnebago County, Illinois is Islander, with 51.16% below the poverty level.

The race least likely to be in poverty in Winnebago County, Illinois is White, with 9.61% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.85%. Among those working part-time, it was 18.50%, and for those that did not work, the poverty rate was 20.14%.

Winnebago County, Illinois Poverty

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Name Poverty
Less Than 9th Grade26.72%
High School13.47%
Some College9.89%
Bachelors or Greater4.28%

Winnebago County, Illinois Poverty Rate by Education

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Rate Poverty
Female Unemployed44.87%
Male Unemployed32.59%
Female Employed9.50%
Male Employed6.57%

Winnebago County, Illinois Poverty Rate by Employment Status and Sex

Winnebago County, Illinois Income by Household Type

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Name Median Mean
Households$54,489$71,360
Families$66,940$84,580
Married Families$82,835$99,415
Non Families$32,011$43,851
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Income by Household Type

Winnebago County, Illinois Marital Status

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Marriage Rates

47.7%

Overall Marriage Rate

49.8%

Male Marriage Rate

45.7%

Female Marriage Rate

Winnebago County, Illinois Married by Age and Sex

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Winnebago County, Illinois Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Winnebago County, Illinois Marital Status by Race

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Winnebago County, Illinois Marital Status

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16,663

Number of Veterans

15,620

Male Veterans

1,043

Female Veterans

War Veterans
Vietnam6,535
First Gulf War2,348
Second Gulf War2,218
Korea1,391
World War II750

Winnebago County, Illinois Veterans by War

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Age Group Veterans
65 to 744,940
75+4,177
35 to 543,535
55 to 642,851
18 to 341,160

Winnebago County, Illinois Veterans by Age

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Name Veterans % of Total
White14,8598.35%
Black1,2504.85%
Hispanic6442.87%
Asian2544.52%
2+ Races1794.45%
Other Race872.36%
Native American345.43%

Winnebago County, Illinois Veterans by Race

Winnebago County, Illinois Veterans by Education

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6.48%

Veteran Poverty Rate

28.68%

Veteran Disability Rate

Winnebago County, Illinois Veterans by Education

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64.1%

Labor Force Participation

58.9%

Employment Rate

8.1%

Unemployment Rate

Winnebago County, Illinois Employment by Age

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Winnebago County, Illinois Employment by Race

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Winnebago County, Illinois Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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68.57%

Born in Winnebago County, Illinois

91.60%

Native Born

8.40%

Foreign Born

4.28%

Non Citizen

4.12%

Naturalized

Place of Birth

91.60% of Winnebago County, Illinois residents were born in the United States, with 68.57% having been born in Illinois. 4.28% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Winnebago County, Illinois Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources