Union County, Illinois Age & Gender Statistics (2024)

Total Population

16,997

Median Age

44.3

Male Median

43.5

Female Median

44.9

Union County, Illinois Population Growth

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

Union County, Illinois Demographic Trend

Since 2010, the population of has changed by -5.4%%.

-5.4%% Growth

Union County, Illinois Age & Gender Pyramid

Population pyramid for

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


Union County, Illinois Historical Population Data

YearMedian AgePopulation
202444.316,997
202344.316,972
202244.717,122
202143.817,259
202043.816,829
201943.716,968
201843.717,127
201743.517,267
201643.717,458
201543.617,551
201443.517,620
201343.217,722
201243.317,799
201143.217,883
201043.017,959

Union County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.2%
5–1716.1%
18–246.9%
25–3410.9%
35–5424.1%
55–6413.8%
65+22.9%

Dependency Ratios for Union County, Illinois

Total Dependency Ratio:
79.3
Youth Dependency:
38.1
Old-Age Dependency:
41.1

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



Age & Gender FAQs for Union County, Illinois

The median age in Union County, Illinois is 44.3 years.

According to latest Census data, the total population of Union County, Illinois is 16,997.

In Union County, Illinois, seniors (ages 65+) make up 22.9% of the population, while children under 18 represent 16.1%.

Based on historical data since 2010, the population in Union County, Illinois has remained stable.
Back to Overview