Gallatin County, Montana Age & Gender Distribution (2024)
Population distribution by age and gender for Gallatin County, Montana
Gallatin County, Montana Age & Gender Statistics (2024)
Total Population
124,074
Median Age
34.2
Male Median
33.2
Female Median
35.1
Gallatin County, Montana Population Growth
Gallatin County, Montana Demographic Trend
Since 2010, the population of has changed by +41.5%%.
+41.5%% Growth
Gallatin County, Montana Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Gallatin County, Montana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 34.2 | 124,074 |
| 2023 | 33.8 | 122,194 |
| 2022 | 33.5 | 119,685 |
| 2021 | 33.7 | 116,725 |
| 2020 | 33.4 | 111,401 |
| 2019 | 33.4 | 108,063 |
| 2018 | 33.5 | 104,729 |
| 2017 | 33.4 | 100,733 |
| 2016 | 33.2 | 97,958 |
| 2015 | 33.2 | 95,323 |
| 2014 | 33.0 | 93,108 |
| 2013 | 32.8 | 91,499 |
| 2012 | 32.4 | 90,339 |
| 2011 | 32.1 | 89,146 |
| 2010 | 31.8 | 87,676 |
Gallatin County, Montana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.6% |
| 5–17 | 14.2% |
| 18–24 | 15.9% |
| 25–34 | 16.5% |
| 35–54 | 25.2% |
| 55–64 | 10.0% |
| 65+ | 13.6% |
Dependency Ratios for Gallatin County, Montana
- Total Dependency Ratio:
- 47.9
- Youth Dependency:
- 27.8
- Old-Age Dependency:
- 20.1
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Gallatin County, Montana
The median age in Gallatin County, Montana is 34.2 years.
According to latest Census data, the total population of Gallatin County, Montana is 124,074.
In Gallatin County, Montana, seniors (ages 65+) make up 13.6% of the population, while children under 18 represent 14.2%.
Based on historical data since 2010, the population in Gallatin County, Montana is aging.