Monroe County, Illinois Age & Gender Statistics (2024)

Total Population

35,036

Median Age

43.2

Male Median

42.5

Female Median

44.2

Monroe County, Illinois Population Growth

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

Monroe County, Illinois Demographic Trend

Since 2010, the population of has changed by +8.0%%.

+8.0%% Growth

Monroe County, Illinois Age & Gender Pyramid

Population pyramid for

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


Monroe County, Illinois Historical Population Data

YearMedian AgePopulation
202443.235,036
202342.534,969
202242.534,905
202142.334,732
202042.334,444
201942.034,168
201842.633,936
201742.333,739
201642.333,703
201542.133,539
201441.733,373
201340.733,181
201240.533,003
201140.332,767
201040.132,431

Monroe County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.2%
5–1716.7%
18–246.6%
25–3410.5%
35–5426.1%
55–6415.3%
65+19.7%

Dependency Ratios for Monroe County, Illinois

Total Dependency Ratio:
71.1
Youth Dependency:
37.4
Old-Age Dependency:
33.8

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



Age & Gender FAQs for Monroe County, Illinois

The median age in Monroe County, Illinois is 43.2 years.

According to latest Census data, the total population of Monroe County, Illinois is 35,036.

In Monroe County, Illinois, seniors (ages 65+) make up 19.7% of the population, while children under 18 represent 16.7%.

Based on historical data since 2010, the population in Monroe County, Illinois is aging.
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