Foster County, North Dakota Age & Gender Distribution (2024)
Population distribution by age and gender for Foster County, North Dakota
Foster County, North Dakota Age & Gender Statistics (2024)
Total Population
3,358
Median Age
43.4
Male Median
41.6
Female Median
48.8
Foster County, North Dakota Population Growth

Foster County, North Dakota Demographic Trend
Since 2010, the population of has changed by -2.2%%.
-2.2%% Growth
Foster County, North Dakota Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Foster County, North Dakota Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 43.4 | 3,358 |
| 2023 | 43.3 | 3,372 |
| 2022 | 45.1 | 3,388 |
| 2021 | 44.2 | 3,396 |
| 2020 | 44.3 | 3,231 |
| 2019 | 44.8 | 3,260 |
| 2018 | 45.6 | 3,290 |
| 2017 | 46.4 | 3,318 |
| 2016 | 46.7 | 3,345 |
| 2015 | 46.9 | 3,366 |
| 2014 | 46.4 | 3,364 |
| 2013 | 46.1 | 3,355 |
| 2012 | 45.7 | 3,368 |
| 2011 | 46.3 | 3,389 |
| 2010 | 45.8 | 3,434 |
Foster County, North Dakota Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.8% |
| 5–17 | 16.0% |
| 18–24 | 3.6% |
| 25–34 | 13.7% |
| 35–54 | 22.7% |
| 55–64 | 14.1% |
| 65+ | 24.1% |
Dependency Ratios for Foster County, North Dakota
- Total Dependency Ratio:
- 84.8
- Youth Dependency:
- 40.2
- Old-Age Dependency:
- 44.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Foster County, North Dakota
The median age in Foster County, North Dakota is 43.4 years.
According to latest Census data, the total population of Foster County, North Dakota is 3,358.
In Foster County, North Dakota, seniors (ages 65+) make up 24.1% of the population, while children under 18 represent 16.0%.
Based on historical data since 2010, the population in Foster County, North Dakota is becoming younger.