Marion County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Marion County, Illinois
Marion County, Illinois Age & Gender Statistics (2024)
Total Population
37,000
Median Age
41.5
Male Median
40.5
Female Median
42.5
Marion County, Illinois Population Growth
Marion County, Illinois Demographic Trend
Since 2010, the population of has changed by -6.9%%.
-6.9%% Growth
Marion County, Illinois Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Marion County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 41.5 | 37,000 |
| 2023 | 41.3 | 37,294 |
| 2022 | 41.9 | 37,543 |
| 2021 | 42.1 | 37,781 |
| 2020 | 42.4 | 37,524 |
| 2019 | 42.2 | 37,743 |
| 2018 | 42.1 | 38,084 |
| 2017 | 41.8 | 38,305 |
| 2016 | 41.6 | 38,503 |
| 2015 | 41.7 | 38,665 |
| 2014 | 41.5 | 38,922 |
| 2013 | 41.5 | 39,070 |
| 2012 | 41.4 | 39,319 |
| 2011 | 41.1 | 39,586 |
| 2010 | 40.8 | 39,722 |
Marion County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.2% |
| 5–17 | 17.3% |
| 18–24 | 7.1% |
| 25–34 | 11.8% |
| 35–54 | 23.6% |
| 55–64 | 13.9% |
| 65+ | 20.2% |
Dependency Ratios for Marion County, Illinois
- Total Dependency Ratio:
- 77.5
- Youth Dependency:
- 41.7
- Old-Age Dependency:
- 35.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Marion County, Illinois
The median age in Marion County, Illinois is 41.5 years.
According to latest Census data, the total population of Marion County, Illinois is 37,000.
In Marion County, Illinois, seniors (ages 65+) make up 20.2% of the population, while children under 18 represent 17.3%.
Based on historical data since 2010, the population in Marion County, Illinois has remained stable.