Stephenson County, Illinois Population 2021

Stephenson County, Illinois's estimated population is 43,900 with a growth rate of -0.68% in the past year according to the most recent United States census data. Stephenson County, Illinois is the 34th largest county in Illinois. The 2010 Population was 47,606 and has seen a growth of -7.78% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202143,900-299-0.68%
202044,199-299-0.67%
201944,498-299-0.67%
201844,797-200-0.44%
201744,997-506-1.11%
201645,503-165-0.36%
201545,668-601-1.30%
201446,269-402-0.86%
201346,671-215-0.46%
201246,886-437-0.92%
201147,323-283-0.59%
201047,606-446-0.93%
199048,052-1,484-3.00%
198049,5366751.38%
197048,8612,6545.74%
196046,2074,61211.09%
195041,5959492.33%
194040,6465821.45%
193040,0642,3216.15%
192037,7439222.50%
191036,8211,8885.40%
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%
18402,8000.00%
2021 Growth Rate
-0.68%
County Website
Founded
1837
County Seat
2010 Population
47,606
Growth Since 2010
-7.78%
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Stephenson County, Illinois Population Growth

Population by Race

Race Population Percentage
White38,70285.83%
Black or African American4,3349.61%
Two or More Races1,4173.14%
Asian3820.85%
Some Other Race1750.39%
American Indian and Alaska Native830.18%
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Stephenson County, Illinois Population by Race

Stephenson County, Illinois Population Pyramid $2021

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Stephenson County, Illinois Median Age

45.3


Total

43.9


Male

46.9


Female

Stephenson County, Illinois Adults

There are 35,355 adults, (9,959 of whom are seniors) in Stephenson County, Illinois.

Stephenson County, Illinois Age Dependency

77.6

Age Dependency Ratio

39.2

Old Age Dependency Ratio

38.3

Child Dependency Ratio

Stephenson County, Illinois Sex Ratio

Female

23,285

51.64%

Male

21,808

48.36%

Stephenson County, Illinois Population by Age

Stephenson County, Illinois Renter vs Owner Occupied by Household Type

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Stephenson County, Illinois Household Types

Type Owner Renter
Married91%9%
All69.9%30.1%
Non Family54.4%45.6%
Male52.9%47.1%
Female42.1%57.9%

69.9%

Rate of Home Ownership

Stephenson County, Illinois Households and Families

Type Count Average Size Owned
All19,7392.2469.9
Married9,2412.7791
Non Family7,1071.1454.4
Female2,4763.1542.1
Male9153.0352.9

2.77

Average Family Size

2.24

Average Household Size

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Stephenson County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade7472.33%
9th to 12th Grade1,6455.14%
High School Graduate11,20435.00%
Some College8,73727.29%
Associates Degree3,42110.69%
Bachelors Degree4,23313.22%
Graduate Degree2,0286.33%
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Stephenson County, Illinois Educational Attainment by Sex (over 25)

Stephenson County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White28,00626,3255,849
Black2,5762,148166
Hispanic830613114
2+ Races33633614
Asian243194102
Other Race1286646
Native American2525

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

The highest rate of bachelors degrees is among asian people with a rate of 41.98%.

Stephenson County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$32,606$42,844$26,634
Less Than 9th Grade$18,938$21,296$16,977
High School Graduate$29,669$40,477$21,852
Some College$31,178$41,367$26,020
Bachelors Degree$42,132$54,066$38,197
Graduate Degree$64,583$70,144$56,923

$32,606

Average Earnings

$42,844

Average Male

$26,634

Average Female

Stephenson County, Illinois Earnings by Educational Attainment

Stephenson County, Illinois Language by Age

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Stephenson County, Illinois Language

96.24% of Stephenson County, Illinois residents speak only English, while 3.76% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.35% of the population.

Stephenson County, Illinois Language

Stephenson County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White36,4793,84410.54%
Black4,2501,27830.07%
Hispanic1,77640222.64%
Multiple1,36640129.36%
Asian3827519.63%

13.56%

Overall Poverty Rate

13.16%

Male Poverty Rate

13.94%

Female Poverty Rate

Poverty in Stephenson County, Illinois

The race most likely to be in poverty in Stephenson County, Illinois is Black, with 30.07% below the poverty level.

The race least likely to be in poverty in Stephenson County, Illinois is White, with 10.54% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.84%. Among those working part-time, it was 15.18%, and for those that did not work, the poverty rate was 20.20%.

Stephenson County, Illinois Poverty

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Name Poverty
Less Than 9th Grade24.70%
High School13.95%
Some College8.00%
Bachelors or Greater3.42%

Stephenson County, Illinois Poverty Rate by Education

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Rate Poverty
Female Unemployed54.92%
Male Unemployed29.68%
Female Employed6.69%
Male Employed5.52%

Stephenson County, Illinois Poverty Rate by Employment Status and Sex

Stephenson County, Illinois Income by Household Type

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Name Median Mean
Households$48,805$62,817
Families$62,346$75,441
Married Families$74,268$88,003
Non Families$25,782$37,390
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Income by Household Type

Stephenson County, Illinois Marital Status

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Marriage Rates

52.0%

Overall Marriage Rate

54.5%

Male Marriage Rate

49.7%

Female Marriage Rate

Stephenson County, Illinois Married by Age and Sex

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Stephenson County, Illinois Marriage

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

Stephenson County, Illinois Marital Status by Race

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Stephenson County, Illinois Marital Status

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3,191

Number of Veterans

2,806

Male Veterans

385

Female Veterans

War Veterans
Vietnam1,234
First Gulf War455
Korea355
Second Gulf War328
World War II120

Stephenson County, Illinois Veterans by War

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Age Group Veterans
75+962
65 to 74896
55 to 64691
35 to 54483
18 to 34159

Stephenson County, Illinois Veterans by Age

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Name Veterans % of Total
White2,9219.33%
Black2387.80%
Other Race1611.85%
2+ Races112.18%
Hispanic80.78%
Native American416.00%
Asian10.38%

Stephenson County, Illinois Veterans by Race

Stephenson County, Illinois Veterans by Education

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10.40%

Veteran Poverty Rate

32.56%

Veteran Disability Rate

Stephenson County, Illinois Veterans by Education

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61.9%

Labor Force Participation

57.4%

Employment Rate

7%

Unemployment Rate

Stephenson County, Illinois Employment by Age

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Stephenson County, Illinois Employment by Race

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Stephenson 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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73.09%

Born in Stephenson County, Illinois

97.51%

Native Born

2.49%

Foreign Born

1.00%

Non Citizen

1.49%

Naturalized

Place of Birth

97.51% of Stephenson County, Illinois residents were born in the United States, with 73.09% having been born in Illinois. 1.00% 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

  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