Stephenson County, Illinois Population 2024

42,654

Stephenson County, Illinois's estimated 2024 population is 42,654 with a growth rate of -1.05% in the past year according to the most recent United States census data. Stephenson County, Illinois is the 33rd largest county in Illinois. The 2010 population was 47,606 and has seen a growth of -10.4% since that time.

Note: data after 2022 is projected based on recent change

36 Rows

Year
Population
Growth
Change
202940,399-451-1.1%
202840,850-451-1.09%
202741,301-451-1.08%
202641,752-451-1.07%
202542,203-451-1.06%
202442,654-451-1.05%
202343,105-451-1.04%
202243,556-506-1.15%
202144,062-441-0.99%
202044,5031320.3%
201944,371-331-0.74%
201844,702-296-0.66%
201744,998-514-1.13%
201645,512-168-0.37%
201545,680-600-1.3%
201446,280-403-0.86%
201346,683-212-0.45%
201246,895-433-0.91%
201147,328-278-0.58%
201047,60600%
199048,052-1,484-3%
198049,5366751.38%
197048,8612,6545.74%
196046,2074,61211.09%
195041,5959492.33%
194040,6465821.45%
193040,0642,3216.15%
192037,7439222.5%
191036,8211,8885.4%
190034,9333,59511.47%
189031,338-625-1.96%
188031,9631,3554.43%
187030,6085,49621.89%
186025,11213,446115.26%
185011,6668,866316.64%
18402,800-37,599-93.07%
2024 Growth Rate
-1.05% (-451)
County Website
Stephenson County
County Seat
Freeport
2020 Population
44,503
Area
564 mi²
Density
76 people/mi²
Growth Since 2020
-4.15% (-1,849)
Founded
1837

Population by Race

Race
Population
Percentage (of total)
White37,04783.29%
Black or African American3,8618.68%
Two or more races2,6255.9%
Other race4661.05%
Asian4050.91%
Native American780.18%
Native Hawaiian or Pacific Islander00%

White

Black or African American

Two or more races

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Stephenson County, Illinois Population by Race

Stephenson County, Illinois Population Pyramid 2024

Stephenson County, Illinois Median Age

45.6

Total

43.6

Male

47.6

Female

Stephenson County, Illinois Adults

There are 35,005 adults, (10,538 of whom are seniors) in Stephenson County, Illinois.

Stephenson County, Illinois Age Dependency

81.8

Age Dependency Ratio

43.1

Old Age Dependency Ratio

38.7

Child Dependency Ratio

Stephenson County, Illinois Sex Ratio

Female22,71951.07%
Male21,76348.93%

Stephenson County, Illinois Population by Age

Stephenson County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All19,3372.2669.530.5
Married9,1102.8486.513.5
Non Family7,3211.1654.345.7
Female2,0863.2250.849.2
Male8203.3365.634.4

2.82

Average Family Size

2.26

Average Household Size

69.5%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Stephenson County, Illinois Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade1,8095.72%
Associates Degree3,40010.75%
Bachelors Degree4,13013.06%
Graduate Degree2,2837.22%
High School Graduate10,57733.44%
Less Than 9th Grade7802.47%
Some College8,65127.35%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Stephenson County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White27,43725,6255,869
Black2,4642,020220
Hispanic959679196
2+ Races70362261
Other Race286179111
Asian28222997
Native American51274

The highest rate of high school graduation is among white people with a rate of 93.4%.

The highest rate of bachelors degrees is among other race people with a rate of 38.81%.

Stephenson County, Illinois Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$52,214$62,684$45,928
Graduate Degree$74,766$78,140$69,955
High School Graduate$33,863$47,051$25,347
Less Than 9th Grade$27,439$40,521$21,851
Overall$40,144$48,426$32,195
Some College$36,205$42,490$31,661

$40,144

Average Earnings

$48,426

Average Male

$32,195

Average Female

Stephenson County, Illinois Earnings by Educational Attainment

Stephenson County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Stephenson County, Illinois Language

96.38% of Stephenson County, Illinois residents speak only English, while 3.62% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.22% of the population.

Stephenson County, Illinois Language

Stephenson County, Illinois Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White35,4143,4779.82%
Black3,7451,44538.58%
Multiple2,55249319.32%
Hispanic2,02227413.55%
Asian40511227.65%
Other46610221.89%
Native783544.87%

13.34%

Overall Poverty Rate

12.97%

Male Poverty Rate

13.7%

Female Poverty Rate

Poverty in Stephenson County, Illinois

The race most likely to be in poverty in Stephenson County, Illinois is Native, with 44.87% below the poverty level.

The race least likely to be in poverty in Stephenson County, Illinois is White, with 9.82% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.03%. Among those working part-time, it was 16.78%, and for those that did not work, the poverty rate was 20.66%.

Stephenson County, Illinois Poverty

rate

Rate
Poverty
Less Than 9th Grade20.78%
High School13.06%
Some College11.42%
Bachelors or Greater3.33%

Stephenson County, Illinois Poverty Rate by Education

rate

Rate
Poverty
Female Unemployed46.22%
Male Unemployed33.04%
Female Employed6.31%
Male Employed4.92%

Stephenson County, Illinois Poverty Rate by Employment Status and Sex

Stephenson County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$73,244$88,319
Households$57,527$74,090
Married Families$87,724$-999,999,999
Non Families$31,753$47,008

mean

median

Income by Household Type

Stephenson County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.6%

Overall Marriage Rate

53.8%

Male Marriage Rate

49.5%

Female Marriage Rate

Stephenson County, Illinois Married by Age and Sex

male

female

Stephenson 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.

Stephenson County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Stephenson County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,673

Number of Veterans

2,556

Male Veterans

117

Female Veterans

War
Veterans
Vietnam1,062
First Gulf War413
Korea361
Second Gulf War175
World War II58

Stephenson County, Illinois Veterans by War

count

Age Group
Veterans
65 to 74931
75+872
35 to 54427
55 to 64387
18 to 3456

Stephenson County, Illinois Veterans by Age

count

Name
Veterans
% of Total
White2,3250.07679857303296558
Black2950.10584858270541801
2+ Races530.04809437386569873
Hispanic30.0025951557093425604

Stephenson County, Illinois Veterans by Race

Stephenson County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

7.54%

Veteran Poverty Rate

35.72%

Veteran Disability Rate

Stephenson County, Illinois Veterans by Education

LaborForceParticipation

59.3%

Labor Force Participation

55.8%

Employment Rate

5.3%

Unemployment Rate

Stephenson County, Illinois Employment by Age

LaborForceParticipation

Stephenson County, Illinois Employment by Race

LaborForceParticipation

Stephenson 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

71.46%

Born in Stephenson County, Illinois

97.63%

Native Born

2.37%

Foreign Born

1.12%

Non Citizen

1.25%

Naturalized

Place of Birth

97.63% of Stephenson County, Illinois residents were born in the United States, with 71.46% having been born in Illinois. 1.12% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Stephenson County, Illinois Place of Birth

Sources