Marion County, Missouri Age & Gender Distribution (2024)
Population distribution by age and gender for Marion County, Missouri
Marion County, Missouri Age & Gender Statistics (2024)
Total Population
28,457
Median Age
39.6
Male Median
38.3
Female Median
40.4
Marion County, Missouri Population Growth

Marion County, Missouri Demographic Trend
Since 2010, the population of has changed by -0.4%%.
-0.4%% Growth
Marion County, Missouri Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Marion County, Missouri Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.6 | 28,457 |
| 2023 | 39.4 | 28,493 |
| 2022 | 39.0 | 28,525 |
| 2021 | 39.2 | 28,564 |
| 2020 | 38.9 | 28,572 |
| 2019 | 38.9 | 28,608 |
| 2018 | 39.1 | 28,672 |
| 2017 | 39.2 | 28,703 |
| 2016 | 39.4 | 28,858 |
| 2015 | 39.7 | 28,840 |
| 2014 | 39.7 | 28,844 |
| 2013 | 39.5 | 28,804 |
| 2012 | 39.3 | 28,703 |
| 2011 | 38.7 | 28,623 |
| 2010 | 38.6 | 28,579 |
Marion County, Missouri Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 7.1% |
| 5–17 | 16.9% |
| 18–24 | 8.8% |
| 25–34 | 11.6% |
| 35–54 | 23.7% |
| 55–64 | 12.9% |
| 65+ | 19.0% |
Dependency Ratios for Marion County, Missouri
- Total Dependency Ratio:
- 75.5
- Youth Dependency:
- 42.1
- Old-Age Dependency:
- 33.3
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Marion County, Missouri
The median age in Marion County, Missouri is 39.6 years.
According to latest Census data, the total population of Marion County, Missouri is 28,457.
In Marion County, Missouri, seniors (ages 65+) make up 19.0% of the population, while children under 18 represent 16.9%.
Based on historical data since 2010, the population in Marion County, Missouri has remained stable.