Dewey County, South Dakota Age & Gender Distribution (2024)
Population distribution by age and gender for Dewey County, South Dakota
Dewey County, South Dakota Age & Gender Statistics (2024)
Total Population
5,205
Median Age
27.7
Male Median
25.7
Female Median
29.0
Dewey County, South Dakota Population Growth
Dewey County, South Dakota Demographic Trend
Since 2010, the population of has changed by -2.8%%.
-2.8%% Growth
Dewey County, South Dakota Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Dewey County, South Dakota Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 27.7 | 5,205 |
| 2023 | 27.6 | 5,230 |
| 2022 | 27.1 | 5,275 |
| 2021 | 28.1 | 5,343 |
| 2020 | 27.4 | 5,841 |
| 2019 | 26.9 | 5,833 |
| 2018 | 27.8 | 5,779 |
| 2017 | 28.0 | 5,709 |
| 2016 | 28.5 | 5,652 |
| 2015 | 29.1 | 5,579 |
| 2014 | 28.9 | 5,510 |
| 2013 | 29.2 | 5,419 |
| 2012 | 29.1 | 5,358 |
| 2011 | 29.2 | 5,331 |
| 2010 | 28.8 | 5,354 |
Dewey County, South Dakota Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 11.5% |
| 5–17 | 26.9% |
| 18–24 | 8.9% |
| 25–34 | 12.0% |
| 35–54 | 20.1% |
| 55–64 | 10.7% |
| 65+ | 10.0% |
Dependency Ratios for Dewey County, South Dakota
- Total Dependency Ratio:
- 93.4
- Youth Dependency:
- 74.2
- Old-Age Dependency:
- 19.2
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Dewey County, South Dakota
The median age in Dewey County, South Dakota is 27.7 years.
According to latest Census data, the total population of Dewey County, South Dakota is 5,205.
In Dewey County, South Dakota, seniors (ages 65+) make up 10.0% of the population, while children under 18 represent 26.9%.
Based on historical data since 2010, the population in Dewey County, South Dakota has remained stable.