Stillwater County, Montana Age & Gender Distribution (2024)
Population distribution by age and gender for Stillwater County, Montana
Stillwater County, Montana Age & Gender Statistics (2024)
Total Population
9,182
Median Age
46.7
Male Median
46.6
Female Median
46.8
Stillwater County, Montana Population Growth

Stillwater County, Montana Demographic Trend
Since 2010, the population of has changed by +2.8%%.
+2.8%% Growth
Stillwater County, Montana Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Stillwater County, Montana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 46.7 | 9,182 |
| 2023 | 47.4 | 9,052 |
| 2022 | 48.0 | 8,978 |
| 2021 | 48.3 | 8,916 |
| 2020 | 47.5 | 9,562 |
| 2019 | 46.8 | 9,466 |
| 2018 | 46.6 | 9,410 |
| 2017 | 46.5 | 9,342 |
| 2016 | 46.6 | 9,342 |
| 2015 | 46.7 | 9,288 |
| 2014 | 47.3 | 9,214 |
| 2013 | 47.0 | 9,173 |
| 2012 | 46.0 | 9,096 |
| 2011 | 45.4 | 9,026 |
| 2010 | 45.0 | 8,934 |
Stillwater County, Montana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.2% |
| 5–17 | 16.8% |
| 18–24 | 6.3% |
| 25–34 | 9.3% |
| 35–54 | 23.2% |
| 55–64 | 15.0% |
| 65+ | 25.2% |
Dependency Ratios for Stillwater County, Montana
- Total Dependency Ratio:
- 85.8
- Youth Dependency:
- 38.9
- Old-Age Dependency:
- 46.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Stillwater County, Montana
The median age in Stillwater County, Montana is 46.7 years.
According to latest Census data, the total population of Stillwater County, Montana is 9,182.
In Stillwater County, Montana, seniors (ages 65+) make up 25.2% of the population, while children under 18 represent 16.8%.
Based on historical data since 2010, the population in Stillwater County, Montana is aging.