Decatur County, Indiana Age & Gender Statistics (2024)

Total Population

26,422

Median Age

39.8

Male Median

39.3

Female Median

41.2

Decatur County, Indiana Population Growth

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

Decatur County, Indiana Demographic Trend

Since 2010, the population of has changed by +3.3%%.

+3.3%% Growth

Decatur County, Indiana Age & Gender Pyramid

Population pyramid for

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


Decatur County, Indiana Historical Population Data

YearMedian AgePopulation
202439.826,422
202340.426,411
202239.726,432
202139.826,466
202039.626,587
201939.226,562
201838.926,552
201738.826,480
201639.126,340
201539.526,240
201439.526,112
201339.125,939
201238.825,772
201138.225,682
201037.425,584

Decatur County, Indiana Age Group Breakdown (2024)

Age CohortPercentage
Under 56.2%
5–1717.3%
18–247.9%
25–3412.4%
35–5424.6%
55–6413.4%
65+18.2%

Dependency Ratios for Decatur County, Indiana

Total Dependency Ratio:
71.4
Youth Dependency:
40.3
Old-Age Dependency:
31.1

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



Age & Gender FAQs for Decatur County, Indiana

The median age in Decatur County, Indiana is 39.8 years.

According to latest Census data, the total population of Decatur County, Indiana is 26,422.

In Decatur County, Indiana, seniors (ages 65+) make up 18.2% of the population, while children under 18 represent 17.3%.

Based on historical data since 2010, the population in Decatur County, Indiana is aging.
Back to Overview