COUNTY · 1990 CENSUS

Clark County

Illinois · 15,921 residents · 501 sq mi

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Clark County is home to 15,921 people in Illinois. Owners hold 78% of the housing stock. Median home value sits at $34,300. 9% of adults hold a bachelor's degree or higher. At a median age of 36.9, this is an older place than the country as a whole. That trails the Illinois median by roughly 28%.

At a glance

Lower income

below the US median

US median: $30,130

Older

median age 36.9

US median: 33.0

Less educated

9% hold a bachelor's degree

US average: 20%

More affordable

home values down 29%, inflation adjusted

US median home: $93,722

Section 01

Population & growth

Total population

15,921

−6%vs 2000

vs 17,008 in 2000

1990 – 2025

Median age

36.9

−6%vs 2000

vs 39.2 in 2000

US average: 33.0

Land area

501 sq mi

Population, 1990 – 2024

202415K

Age distribution, 1990

Under 56.5%(1,037)

US avg: 7.3%

5 to 97%(1,113)

US avg: 7.3%

10 to 147%(1,116)

US avg: 6.9%

15 to 196.7%(1,067)

US avg: 7.1%

20 to 245.4%(854)

US avg: 7.5%

25 to 3414.7%(2,333)

US avg: 17.5%

35 to 4413.8%(2,202)

US avg: 15.1%

45 to 549.6%(1,521)

US avg: 10.2%

55 to 6410%(1,588)

US avg: 8.5%

65 to 7410.3%(1,639)

US avg: 7.3%

75 to 846.9%(1,098)

US avg: 4%

85 and over2.2%(353)

US avg: 1.2%

BAR + DOT: THIS PLACE · TICK: US AVERAGE

Section 02

Income & economy

Median household income

$23,281

−15%inflation adjusted, since 2000

vs $35,967 in 2000

US average: $30,130

1990 – 2024

Per capita income

$11,176

−37%vs 2000

vs $17,655 in 2000

US average: $14,340

Poverty rate

12.0%

+2.8 ptsvs 2000

vs 9.2% in 2000

US average: 13.2%

Section 03

Housing

Median home value

$34,300

−29%inflation adjusted, since 2000

vs $64,000 in 2000

US average: $93,722

1990 – 2024

Median gross rent

$264

−18%inflation adjusted, since 2000

vs $422 in 2000

US average: $450

Owner-occupied

78.2%

+0.7 ptsvs 2000

vs 77.5% in 2000

21.8% rent

Section 04

Race & ethnicity

2000

White, non-Hispanic98.6%(16,766)

Black0.2%(33)

Hispanic / Latino0.3%(54)

Asian0.1%(22)

Other0%

1990

White, non-Hispanic98.9%(15,753)

Black0%(6)

Hispanic / Latino0.1%(14)

Asian0.6%(99)

Other0.4%(63)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin

Mexican1.6%(247)

Puerto Rican0%(5)

Asian origin

Vietnamese0.1%(9)

Thai0%(5)

Asian Indian0%(5)

Ancestry

German22.4%(3,420)

English15.7%(2,402)

Irish13.2%(2,010)

American8%(1,218)

Polish2%(309)

Dutch1.4%(216)

Scottish1.4%(210)

French1.3%(200)

Italian1.2%(183)

Norwegian0.7%(110)

Swedish0.5%(75)

Scotch-Irish0.5%(74)

+ 14 more ancestry groups with data

Swiss0.4%(58)

French Canadian0.3%(39)

Brazilian0.2%(34)

Czech0.2%(30)

Serbian0.2%(29)

Lithuanian0.2%(25)

British0.1%(12)

Belgian0.1%(11)

Welsh0.1%(10)

Russian0.1%(9)

Canadian0.1%(8)

Australian0%(5)

Hungarian0%(4)

Subsaharan African0%(3)

RANKED:Largest German population · Largest English population · Largest Irish population · Largest American population · Largest Polish population

Section 05

Education

Bachelor's degree or higher

9.2%

−4.4 ptsvs 2000

vs 13.6% in 2000

US average: 20.3%

High school or higher

71.3%

−8.7 ptsvs 2000

vs 80.0% in 2000

US average: 75.2%

Graduate degree

2.8%

−1.5 ptsvs 2000

vs 4.3% in 2000

US average: 7.1%

Section 06

Commute & transportation

Average commute

23.1 min

+47%vs 2000

vs 15.7 min in 2000

US average: 21.9

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status (2024)

Men 15+

Never married27.2%(1,688)

Married57.6%(3,576)

Widowed4.4%(273)

Divorced10.8%(669)

Women 15+

Never married22.2%(1,385)

Married56.5%(3,529)

Widowed10.1%(629)

Divorced11.3%(704)

SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024

Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured

4.7%

−4.2 ptssince 2013

from 8.9% in 2013

US average: 8.4%

Employer-based

57.1%

−1.8 ptssince 2020

from 58.9% in 2020

US average: 54.8%

Direct-purchase

15.9%

−0.4 ptssince 2020

from 16.3% in 2020

US average: 13.8%

Medicare

21.9%

+0.3 ptssince 2020

from 21.6% in 2020

US average: 18.4%

Medicaid

22.3%

+1.3 ptssince 2020

from 21.0% in 2020

US average: 20.9%

VA health care

3.1%

+0.7 ptssince 2020

from 2.4% in 2020

US average: 2.2%

Any private

71.2%

−2.1 ptssince 2020

from 73.3% in 2020

US average: 67.1%

Any public

41.7%

+0.6 ptssince 2020

from 41.1% in 2020

US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024

Gulf War (2001 or later)24.3%(225)

US avg: 26.4%

Gulf War (1990s)20.8%(192)

US avg: 24.3%

Vietnam era39.7%(367)

US avg: 33.1%

Korean War9.2%(85)

US avg: 4.5%

World War II0.5%(5)

US avg: 1%

Share of the 925 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

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