Union County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Union County, Iowa
Union County, Iowa Age & Gender Statistics (2024)
Total Population
11,993
Median Age
40.5
Male Median
39.4
Female Median
41.8
Union County, Iowa Population Growth

Union County, Iowa Demographic Trend
Since 2010, the population of has changed by -3.4%%.
-3.4%% Growth
Union County, Iowa Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Union County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 40.5 | 11,993 |
| 2023 | 40.6 | 12,038 |
| 2022 | 40.0 | 12,107 |
| 2021 | 39.7 | 12,193 |
| 2020 | 40.6 | 12,303 |
| 2019 | 40.3 | 12,358 |
| 2018 | 39.9 | 12,453 |
| 2017 | 40.1 | 12,497 |
| 2016 | 40.3 | 12,539 |
| 2015 | 40.6 | 12,575 |
| 2014 | 41.1 | 12,554 |
| 2013 | 41.3 | 12,547 |
| 2012 | 41.5 | 12,525 |
| 2011 | 41.5 | 12,471 |
| 2010 | 41.4 | 12,409 |
Union County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.3% |
| 5–17 | 17.2% |
| 18–24 | 9.2% |
| 25–34 | 10.8% |
| 35–54 | 23.7% |
| 55–64 | 13.1% |
| 65+ | 20.8% |
Dependency Ratios for Union County, Iowa
- Total Dependency Ratio:
- 76.2
- Youth Dependency:
- 39.6
- Old-Age Dependency:
- 36.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Union County, Iowa
The median age in Union County, Iowa is 40.5 years.
According to latest Census data, the total population of Union County, Iowa is 11,993.
In Union County, Iowa, seniors (ages 65+) make up 20.8% of the population, while children under 18 represent 17.2%.
Based on historical data since 2010, the population in Union County, Iowa has remained stable.