Jefferson County, Montana Age & Gender Distribution (2024)
Population distribution by age and gender for Jefferson County, Montana
Jefferson County, Montana Age & Gender Statistics (2024)
Total Population
12,774
Median Age
47.1
Male Median
47.1
Female Median
47.0
Jefferson County, Montana Population Growth
Jefferson County, Montana Demographic Trend
Since 2010, the population of has changed by +14.4%%.
+14.4%% Growth
Jefferson County, Montana Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Jefferson County, Montana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 47.1 | 12,774 |
| 2023 | 47.3 | 12,501 |
| 2022 | 47.4 | 12,273 |
| 2021 | 47.5 | 12,057 |
| 2020 | 47.5 | 12,069 |
| 2019 | 47.6 | 11,917 |
| 2018 | 47.9 | 11,778 |
| 2017 | 47.9 | 11,625 |
| 2016 | 47.9 | 11,601 |
| 2015 | 47.7 | 11,502 |
| 2014 | 47.6 | 11,465 |
| 2013 | 47.3 | 11,434 |
| 2012 | 46.8 | 11,360 |
| 2011 | 45.8 | 11,281 |
| 2010 | 45.6 | 11,166 |
Jefferson County, Montana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.4% |
| 5–17 | 15.6% |
| 18–24 | 6.2% |
| 25–34 | 9.5% |
| 35–54 | 24.8% |
| 55–64 | 16.3% |
| 65+ | 23.2% |
Dependency Ratios for Jefferson County, Montana
- Total Dependency Ratio:
- 76.0
- Youth Dependency:
- 35.2
- Old-Age Dependency:
- 40.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Jefferson County, Montana
The median age in Jefferson County, Montana is 47.1 years.
According to latest Census data, the total population of Jefferson County, Montana is 12,774.
In Jefferson County, Montana, seniors (ages 65+) make up 23.2% of the population, while children under 18 represent 15.6%.
Based on historical data since 2010, the population in Jefferson County, Montana has remained stable.