Iroquois County, Illinois Age & Gender Statistics (2024)

Total Population

26,449

Median Age

44.4

Male Median

43.0

Female Median

45.5

Iroquois County, Illinois Population Growth

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

Iroquois County, Illinois Demographic Trend

Since 2010, the population of has changed by -12.0%%.

-12.0%% Growth

Iroquois County, Illinois Age & Gender Pyramid

Population pyramid for

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


Iroquois County, Illinois Historical Population Data

YearMedian AgePopulation
202444.426,449
202344.426,746
202244.527,043
202144.227,362
202044.527,437
201944.427,812
201844.528,169
201744.328,457
201644.328,814
201544.129,053
201443.729,272
201343.429,446
201243.229,689
201143.029,901
201042.730,068

Iroquois County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.5%
5–1716.0%
18–247.7%
25–3410.2%
35–5423.1%
55–6414.8%
65+22.6%

Dependency Ratios for Iroquois County, Illinois

Total Dependency Ratio:
79.1
Youth Dependency:
38.6
Old-Age Dependency:
40.5

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



Age & Gender FAQs for Iroquois County, Illinois

The median age in Iroquois County, Illinois is 44.4 years.

According to latest Census data, the total population of Iroquois County, Illinois is 26,449.

In Iroquois County, Illinois, seniors (ages 65+) make up 22.6% of the population, while children under 18 represent 16.0%.

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