Richland County, Illinois Age & Gender Statistics (2024)

Total Population

15,598

Median Age

42.3

Male Median

41.9

Female Median

43.1

Richland County, Illinois Population Growth

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

Richland County, Illinois Demographic Trend

Since 2010, the population of has changed by -3.5%%.

-3.5%% Growth

Richland County, Illinois Age & Gender Pyramid

Population pyramid for

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


Richland County, Illinois Historical Population Data

YearMedian AgePopulation
202442.315,598
202342.515,675
202242.215,716
202142.315,876
202042.515,677
201942.015,766
201841.915,881
201742.315,953
201642.116,072
201542.416,127
201442.816,144
201343.116,213
201243.616,181
201142.916,180
201042.416,166

Richland County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.7%
5–1717.3%
18–247.1%
25–3411.7%
35–5423.5%
55–6414.1%
65+20.7%

Dependency Ratios for Richland County, Illinois

Total Dependency Ratio:
77.7
Youth Dependency:
40.8
Old-Age Dependency:
36.8

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



Age & Gender FAQs for Richland County, Illinois

The median age in Richland County, Illinois is 42.3 years.

According to latest Census data, the total population of Richland County, Illinois is 15,598.

In Richland County, Illinois, seniors (ages 65+) make up 20.7% of the population, while children under 18 represent 17.3%.

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