Decatur County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Decatur County, Iowa
Decatur County, Iowa Age & Gender Statistics (2024)
Total Population
7,759
Median Age
36.1
Male Median
34.1
Female Median
38.6
Decatur County, Iowa Population Growth
Decatur County, Iowa Demographic Trend
Since 2010, the population of has changed by -8.8%%.
-8.8%% Growth
Decatur County, Iowa Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Decatur County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 36.1 | 7,759 |
| 2023 | 36.2 | 7,669 |
| 2022 | 36.6 | 7,684 |
| 2021 | 35.9 | 7,718 |
| 2020 | 36.0 | 7,908 |
| 2019 | 36.4 | 7,979 |
| 2018 | 36.4 | 8,044 |
| 2017 | 36.5 | 8,105 |
| 2016 | 36.8 | 8,210 |
| 2015 | 37.4 | 8,249 |
| 2014 | 37.6 | 8,286 |
| 2013 | 38.3 | 8,308 |
| 2012 | 38.4 | 8,382 |
| 2011 | 38.4 | 8,451 |
| 2010 | 38.7 | 8,508 |
Decatur County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.4% |
| 5–17 | 16.7% |
| 18–24 | 16.2% |
| 25–34 | 10.1% |
| 35–54 | 18.8% |
| 55–64 | 11.6% |
| 65+ | 21.1% |
Dependency Ratios for Decatur County, Iowa
- Total Dependency Ratio:
- 76.4
- Youth Dependency:
- 39.1
- Old-Age Dependency:
- 37.3
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Decatur County, Iowa
The median age in Decatur County, Iowa is 36.1 years.
According to latest Census data, the total population of Decatur County, Iowa is 7,759.
In Decatur County, Iowa, seniors (ages 65+) make up 21.1% of the population, while children under 18 represent 16.7%.
Based on historical data since 2010, the population in Decatur County, Iowa is becoming younger.