Marion County, Florida Age & Gender Distribution (2024)
Population distribution by age and gender for Marion County, Florida
Marion County, Florida Age & Gender Statistics (2024)
Total Population
400,078
Median Age
47.9
Male Median
45.9
Female Median
49.8
Marion County, Florida Population Growth

Marion County, Florida Demographic Trend
Since 2010, the population of has changed by +22.4%%.
+22.4%% Growth
Marion County, Florida Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Marion County, Florida Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 47.9 | 400,078 |
| 2023 | 48.2 | 387,697 |
| 2022 | 48.5 | 378,225 |
| 2021 | 48.3 | 370,372 |
| 2020 | 48.7 | 360,210 |
| 2019 | 48.7 | 353,526 |
| 2018 | 48.6 | 348,371 |
| 2017 | 48.5 | 343,778 |
| 2016 | 48.5 | 340,341 |
| 2015 | 48.2 | 336,811 |
| 2014 | 47.8 | 334,771 |
| 2013 | 47.6 | 333,503 |
| 2012 | 47.4 | 331,987 |
| 2011 | 47.0 | 330,100 |
| 2010 | 46.7 | 326,833 |
Marion County, Florida Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.7% |
| 5–17 | 14.1% |
| 18–24 | 6.5% |
| 25–34 | 11.0% |
| 35–54 | 21.5% |
| 55–64 | 13.6% |
| 65+ | 28.7% |
Dependency Ratios for Marion County, Florida
- Total Dependency Ratio:
- 90.3
- Youth Dependency:
- 35.7
- Old-Age Dependency:
- 54.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Marion County, Florida
The median age in Marion County, Florida is 47.9 years.
According to latest Census data, the total population of Marion County, Florida is 400,078.
In Marion County, Florida, seniors (ages 65+) make up 28.7% of the population, while children under 18 represent 14.1%.
Based on historical data since 2010, the population in Marion County, Florida has remained stable.