Marion County, South Carolina Age & Gender Distribution (2024)
Population distribution by age and gender for Marion County, South Carolina
Marion County, South Carolina Age & Gender Statistics (2024)
Total Population
28,664
Median Age
42.6
Male Median
39.6
Female Median
44.8
Marion County, South Carolina Population Growth

Marion County, South Carolina Demographic Trend
Since 2010, the population of has changed by -14.6%%.
-14.6%% Growth
Marion County, South Carolina Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Marion County, South Carolina Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 42.6 | 28,664 |
| 2023 | 43.0 | 28,900 |
| 2022 | 41.6 | 29,212 |
| 2021 | 41.2 | 29,585 |
| 2020 | 40.7 | 30,954 |
| 2019 | 40.7 | 31,308 |
| 2018 | 40.4 | 31,562 |
| 2017 | 40.0 | 31,765 |
| 2016 | 40.2 | 31,975 |
| 2015 | 39.5 | 32,167 |
| 2014 | 39.7 | 32,411 |
| 2013 | 39.3 | 32,695 |
| 2012 | 39.1 | 33,038 |
| 2011 | 39.4 | 33,335 |
| 2010 | 39.1 | 33,568 |
Marion County, South Carolina Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.1% |
| 5–17 | 17.0% |
| 18–24 | 7.5% |
| 25–34 | 10.9% |
| 35–54 | 24.4% |
| 55–64 | 13.4% |
| 65+ | 21.6% |
Dependency Ratios for Marion County, South Carolina
- Total Dependency Ratio:
- 77.7
- Youth Dependency:
- 39.3
- Old-Age Dependency:
- 38.5
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Marion County, South Carolina
The median age in Marion County, South Carolina is 42.6 years.
According to latest Census data, the total population of Marion County, South Carolina is 28,664.
In Marion County, South Carolina, seniors (ages 65+) make up 21.6% of the population, while children under 18 represent 17.0%.
Based on historical data since 2010, the population in Marion County, South Carolina is aging.