Clark County, Illinois Age & Gender Statistics (2024)

Total Population

15,266

Median Age

42.6

Male Median

40.8

Female Median

43.8

Clark County, Illinois Population Growth

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

Clark County, Illinois Demographic Trend

Since 2010, the population of has changed by -7.7%%.

-7.7%% Growth

Clark County, Illinois Age & Gender Pyramid

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


Clark County, Illinois Historical Population Data

YearMedian AgePopulation
202442.615,266
202342.015,328
202241.415,467
202141.815,587
202041.915,602
201942.315,716
201843.015,836
201743.015,924
201643.116,089
201543.416,159
201443.316,240
201343.116,284
201242.816,353
201142.216,442
201041.616,545

Clark County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.6%
5–1716.7%
18–247.1%
25–3411.3%
35–5424.3%
55–6414.8%
65+20.3%

Dependency Ratios for Clark County, Illinois

Total Dependency Ratio:
74.3
Youth Dependency:
39.0
Old-Age Dependency:
35.3

The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).



Age & Gender FAQs for Clark County, Illinois

The median age in Clark County, Illinois is 42.6 years.

According to latest Census data, the total population of Clark County, Illinois is 15,266.

In Clark County, Illinois, seniors (ages 65+) make up 20.3% of the population, while children under 18 represent 16.7%.

Based on historical data since 2010, the population in Clark County, Illinois has remained stable.
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