Will County, Illinois Age & Gender Statistics (2024)

Total Population

701,462

Median Age

39.1

Male Median

38.3

Female Median

39.8

Will County, Illinois Population Growth

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

Will County, Illinois Demographic Trend

Since 2010, the population of has changed by +5.0%%.

+5.0%% Growth

Will County, Illinois Age & Gender Pyramid

Population pyramid for

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


Will County, Illinois Historical Population Data

YearMedian AgePopulation
202439.1701,462
202338.9698,450
202238.7696,774
202138.3696,403
202038.1689,704
201937.9689,315
201837.6688,697
201737.3687,727
201637.0685,378
201536.6683,995
201436.2682,108
201335.8679,688
201235.5677,669
201135.2674,166
201034.9667,977

Will County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 55.4%
5–1718.2%
18–249.0%
25–3412.1%
35–5427.7%
55–6413.0%
65+14.6%

Dependency Ratios for Will County, Illinois

Total Dependency Ratio:
61.8
Youth Dependency:
38.2
Old-Age Dependency:
23.6

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



Age & Gender FAQs for Will County, Illinois

The median age in Will County, Illinois is 39.1 years.

According to latest Census data, the total population of Will County, Illinois is 701,462.

In Will County, Illinois, seniors (ages 65+) make up 14.6% of the population, while children under 18 represent 18.2%.

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