Sullivan County, Indiana Age & Gender Distribution (2024)
Population distribution by age and gender for Sullivan County, Indiana
Sullivan County, Indiana Age & Gender Statistics (2024)
Total Population
20,780
Median Age
41.7
Male Median
40.1
Female Median
44.8
Sullivan County, Indiana Population Growth

Sullivan County, Indiana Demographic Trend
Since 2010, the population of has changed by -3.4%%.
-3.4%% Growth
Sullivan County, Indiana Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Sullivan County, Indiana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 41.7 | 20,780 |
| 2023 | 41.3 | 20,766 |
| 2022 | 40.9 | 20,791 |
| 2021 | 40.6 | 20,814 |
| 2020 | 41.3 | 20,647 |
| 2019 | 41.0 | 20,730 |
| 2018 | 41.0 | 20,792 |
| 2017 | 41.4 | 20,900 |
| 2016 | 41.0 | 21,026 |
| 2015 | 40.8 | 21,111 |
| 2014 | 41.0 | 21,227 |
| 2013 | 39.9 | 21,321 |
| 2012 | 39.4 | 21,379 |
| 2011 | 39.1 | 21,484 |
| 2010 | 39.1 | 21,520 |
Sullivan County, Indiana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.9% |
| 5–17 | 13.9% |
| 18–24 | 7.7% |
| 25–34 | 13.6% |
| 35–54 | 27.3% |
| 55–64 | 13.7% |
| 65+ | 18.9% |
Dependency Ratios for Sullivan County, Indiana
- Total Dependency Ratio:
- 60.6
- Youth Dependency:
- 30.2
- Old-Age Dependency:
- 30.4
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Sullivan County, Indiana
The median age in Sullivan County, Indiana is 41.7 years.
According to latest Census data, the total population of Sullivan County, Indiana is 20,780.
In Sullivan County, Indiana, seniors (ages 65+) make up 18.9% of the population, while children under 18 represent 13.9%.
Based on historical data since 2010, the population in Sullivan County, Indiana is aging.