Decatur County, Indiana Age & Gender Distribution (2024)
Population distribution by age and gender for Decatur County, Indiana
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

Decatur County, Indiana Demographic Trend
Since 2010, the population of has changed by +3.3%%.
+3.3%% Growth
Decatur County, Indiana Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Decatur County, Indiana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.8 | 26,422 |
| 2023 | 40.4 | 26,411 |
| 2022 | 39.7 | 26,432 |
| 2021 | 39.8 | 26,466 |
| 2020 | 39.6 | 26,587 |
| 2019 | 39.2 | 26,562 |
| 2018 | 38.9 | 26,552 |
| 2017 | 38.8 | 26,480 |
| 2016 | 39.1 | 26,340 |
| 2015 | 39.5 | 26,240 |
| 2014 | 39.5 | 26,112 |
| 2013 | 39.1 | 25,939 |
| 2012 | 38.8 | 25,772 |
| 2011 | 38.2 | 25,682 |
| 2010 | 37.4 | 25,584 |
Decatur County, Indiana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.2% |
| 5–17 | 17.3% |
| 18–24 | 7.9% |
| 25–34 | 12.4% |
| 35–54 | 24.6% |
| 55–64 | 13.4% |
| 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.