Clay County, Illinois Age & Gender Statistics (2024)

Total Population

13,052

Median Age

40.4

Male Median

39.8

Female Median

40.9

Clay County, Illinois Population Growth

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

Clay County, Illinois Demographic Trend

Since 2010, the population of has changed by -6.3%%.

-6.3%% Growth

Clay County, Illinois Age & Gender Pyramid

Population pyramid for

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


Clay County, Illinois Historical Population Data

YearMedian AgePopulation
202440.413,052
202341.513,173
202241.813,248
202142.113,313
202042.113,217
201942.613,287
201842.713,338
201744.013,393
201643.113,466
201542.813,582
201442.713,675
201343.213,744
201242.513,828
201142.213,862
201041.613,927

Clay County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.8%
5–1718.0%
18–247.1%
25–3411.6%
35–5423.1%
55–6413.5%
65+20.9%

Dependency Ratios for Clay County, Illinois

Total Dependency Ratio:
80.9
Youth Dependency:
43.1
Old-Age Dependency:
37.8

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



Age & Gender FAQs for Clay County, Illinois

The median age in Clay County, Illinois is 40.4 years.

According to latest Census data, the total population of Clay County, Illinois is 13,052.

In Clay County, Illinois, seniors (ages 65+) make up 20.9% of the population, while children under 18 represent 18.0%.

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