Marion County, Iowa Age & Gender Distribution (2024)
Population distribution by age and gender for Marion County, Iowa
Marion County, Iowa Age & Gender Statistics (2024)
Total Population
33,642
Median Age
39.9
Male Median
38.6
Female Median
41.0
Marion County, Iowa Population Growth
Marion County, Iowa Demographic Trend
Since 2010, the population of has changed by +0.8%%.
+0.8%% Growth
Marion County, Iowa Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Marion County, Iowa Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.9 | 33,642 |
| 2023 | 39.7 | 33,551 |
| 2022 | 39.8 | 33,487 |
| 2021 | 39.6 | 33,381 |
| 2020 | 39.6 | 33,193 |
| 2019 | 39.4 | 33,172 |
| 2018 | 39.2 | 33,207 |
| 2017 | 39.5 | 33,127 |
| 2016 | 39.2 | 33,197 |
| 2015 | 39.2 | 33,248 |
| 2014 | 38.8 | 33,308 |
| 2013 | 38.6 | 33,318 |
| 2012 | 38.8 | 33,388 |
| 2011 | 38.6 | 33,372 |
| 2010 | 38.7 | 33,378 |
Marion County, Iowa Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.2% |
| 5–17 | 17.9% |
| 18–24 | 10.3% |
| 25–34 | 10.4% |
| 35–54 | 23.5% |
| 55–64 | 13.4% |
| 65+ | 19.4% |
Dependency Ratios for Marion County, Iowa
- Total Dependency Ratio:
- 73.8
- Youth Dependency:
- 40.1
- Old-Age Dependency:
- 33.7
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Marion County, Iowa
The median age in Marion County, Iowa is 39.9 years.
According to latest Census data, the total population of Marion County, Iowa is 33,642.
In Marion County, Iowa, seniors (ages 65+) make up 19.4% of the population, while children under 18 represent 17.9%.
Based on historical data since 2010, the population in Marion County, Iowa has remained stable.