Winnebago County, Illinois Population 2024

279,446

Winnebago County, Illinois's estimated 2024 population is 279,446 with a growth rate of -0.49% in the past year according to the most recent United States census data. Winnebago County, Illinois is the 7th largest county in Illinois. The 2010 population was 295,090 and has seen a growth of -5.3% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029272,591-1,371-0.5%
2028273,962-1,371-0.5%
2027275,333-1,371-0.5%
2026276,704-1,371-0.49%
2025278,075-1,371-0.49%
2024279,446-1,371-0.49%
2023280,817-1,371-0.49%
2022282,188-1,371-0.48%
2021283,559-1,369-0.48%
2020284,9282,4630.87%
2019282,465-1,123-0.4%
2018283,588-1,070-0.38%
2017284,658-1,513-0.53%
2016286,171-1,066-0.37%
2015287,237-1,533-0.53%
2014288,770-2,236-0.77%
2013291,006-1,122-0.38%
2012292,128-1,539-0.52%
2011293,667-1,423-0.48%
2010295,090
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%
190047,8457,90719.8%
189039,9389,43330.92%
188030,5051,2044.11%
187029,3014,81019.64%
186024,49112,718108.03%
185011,7737,164155.44%
18404,609-267,982-98.31%
showing: 36 rows
2024 Growth Rate
-0.49% (-1,371)
County Website
Winnebago County
County Seat
2020 Population
284,928
Area
513 mi²
Density
545 people/mi²
Growth Since 2020
-1.92% (-5,482)
Founded
January 16, 1836

Winnebago County, Illinois Population 2024

Population by Race

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Race
Population
Percentage (of total)
White204,10871.72%
Black or African American38,11113.39%
Two or more races21,7207.63%
Other race11,5534.06%
Asian8,1632.87%
Native American8340.29%
Native Hawaiian or Pacific Islander1020.04%

White

Black or African American

Two or more races

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Winnebago County, Illinois Population by Race

Winnebago County, Illinois Population Pyramid 2024

Winnebago County, Illinois Median Age

39.5

Total

38.6

Male

40.3

Female

Winnebago County, Illinois Adults

There are 218,108 adults, (51,253 of whom are seniors) in Winnebago County, Illinois.

Winnebago County, Illinois Age Dependency

70.6

Age Dependency Ratio

30.7

Old Age Dependency Ratio

39.8

Child Dependency Ratio

Winnebago County, Illinois Sex Ratio

Female144,89450.91%
Male139,69749.09%

Winnebago County, Illinois Population by Age

Winnebago County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All115,2142.4365.734.3
Married50,9773.0585.414.6
Non Family42,0991.2252.847.2
Female16,2813.3941.158.9
Male5,8573.1354.845.2

3.03

Average Family Size

2.43

Average Household Size

65.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Winnebago County, Illinois Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Winnebago County, Illinois Educational Attainment by Sex (over 25)

Winnebago County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 92.27%.

The highest rate of bachelors degrees is among asian people with a rate of 48.41%.

Winnebago County, Illinois Educational Attainment by Race

All

Male

Female

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$42,791

Average Earnings

$51,981

Average Male

$35,738

Average Female

Winnebago County, Illinois Earnings by Educational Attainment

Winnebago County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Winnebago County, Illinois Language

85.15% of Winnebago County, Illinois residents speak only English, while 14.85% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 9.71% of the population.

Winnebago County, Illinois Language

Winnebago County, Illinois Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White185,40719,58210.56%
Black37,10013,54436.51%
Hispanic39,7218,44921.27%
Multiple21,3575,11323.94%
Other11,5111,69314.71%
Asian8,1491,14314.03%
Native8248910.8%
Islander1025755.88%

16.08%

Overall Poverty Rate

15.42%

Male Poverty Rate

16.71%

Female Poverty Rate

Poverty in Winnebago County, Illinois

The race most likely to be in poverty in Winnebago County, Illinois is Islander, with 55.88% below the poverty level.

The race least likely to be in poverty in Winnebago County, Illinois is White, with 10.56% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.38%. Among those working part-time, it was 19.78%, and for those that did not work, the poverty rate was 21.04%.

Winnebago County, Illinois Poverty

rate

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Rate
Poverty
Less Than 9th Grade25.73%
High School16.84%
Some College10.45%
Bachelors or Greater4.24%

Winnebago County, Illinois Poverty Rate by Education

rate

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Rate
Poverty
Male Unemployed38%
Female Unemployed37.79%
Female Employed9.54%
Male Employed6.21%

Winnebago County, Illinois Poverty Rate by Employment Status and Sex

Winnebago County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Winnebago County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

46.5%

Overall Marriage Rate

48.7%

Male Marriage Rate

44.4%

Female Marriage Rate

Winnebago County, Illinois Married by Age and Sex

male

female

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

Married

Widowed

Divorced

Separated

NeverMarried

Winnebago County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

14,820

Number of Veterans

13,584

Male Veterans

1,236

Female Veterans

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Winnebago County, Illinois Veterans by War

count

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Winnebago County, Illinois Veterans by Age

count

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Winnebago County, Illinois Veterans by Race

Winnebago County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

7.34%

Veteran Poverty Rate

29.93%

Veteran Disability Rate

Winnebago County, Illinois Veterans by Education

LaborForceParticipation

62.2%

Labor Force Participation

57.6%

Employment Rate

7.5%

Unemployment Rate

Winnebago County, Illinois Employment by Age

LaborForceParticipation

Winnebago County, Illinois Employment by Race

LaborForceParticipation

Winnebago County, Illinois Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

69.68%

Born in Winnebago County, Illinois

91.29%

Native Born

8.71%

Foreign Born

4.63%

Non Citizen

4.08%

Naturalized

Place of Birth

91.29% of Winnebago County, Illinois residents were born in the United States, with 69.68% having been born in Illinois. 4.63% 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

Sources