Johnson County, Indiana Age & Gender Statistics (2024)

Total Population

166,315

Median Age

38.0

Male Median

36.9

Female Median

39.1

Johnson County, Indiana Population Growth

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

Johnson County, Indiana Demographic Trend

Since 2010, the population of has changed by +22.3%%.

+22.3%% Growth

Johnson County, Indiana Age & Gender Pyramid

Population pyramid for

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


Johnson County, Indiana Historical Population Data

YearMedian AgePopulation
202438.0166,315
202338.1163,983
202237.9161,952
202137.8159,739
202037.6156,148
201937.5153,716
201837.4151,564
201737.3149,359
201637.4147,567
201537.3145,645
201437.2143,789
201337.1141,796
201237.1140,033
201136.8138,227
201036.4135,994

Johnson County, Indiana Age Group Breakdown (2024)

Age CohortPercentage
Under 55.9%
5–1718.3%
18–248.1%
25–3413.5%
35–5426.5%
55–6412.0%
65+15.7%

Dependency Ratios for Johnson County, Indiana

Total Dependency Ratio:
66.7
Youth Dependency:
40.5
Old-Age Dependency:
26.2

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



Age & Gender FAQs for Johnson County, Indiana

The median age in Johnson County, Indiana is 38.0 years.

According to latest Census data, the total population of Johnson County, Indiana is 166,315.

In Johnson County, Indiana, seniors (ages 65+) make up 15.7% of the population, while children under 18 represent 18.3%.

Based on historical data since 2010, the population in Johnson County, Indiana is aging.
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