Custer County, Montana Age & Gender Distribution (2024)
Population distribution by age and gender for Custer County, Montana
Custer County, Montana Age & Gender Statistics (2024)
Total Population
11,961
Median Age
42.7
Male Median
42.4
Female Median
44.2
Custer County, Montana Population Growth

Custer County, Montana Demographic Trend
Since 2010, the population of has changed by +3.6%%.
+3.6%% Growth
Custer County, Montana Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Custer County, Montana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 42.7 | 11,961 |
| 2023 | 42.6 | 11,938 |
| 2022 | 42.8 | 11,957 |
| 2021 | 43.0 | 11,968 |
| 2020 | 42.5 | 11,563 |
| 2019 | 41.4 | 11,729 |
| 2018 | 40.7 | 11,845 |
| 2017 | 41.0 | 11,895 |
| 2016 | 40.7 | 11,980 |
| 2015 | 41.2 | 11,945 |
| 2014 | 41.2 | 11,869 |
| 2013 | 41.4 | 11,785 |
| 2012 | 41.7 | 11,706 |
| 2011 | 42.3 | 11,621 |
| 2010 | 41.8 | 11,548 |
Custer County, Montana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.8% |
| 5–17 | 15.0% |
| 18–24 | 7.7% |
| 25–34 | 11.5% |
| 35–54 | 26.0% |
| 55–64 | 14.2% |
| 65+ | 20.8% |
Dependency Ratios for Custer County, Montana
- Total Dependency Ratio:
- 68.2
- Youth Dependency:
- 33.3
- Old-Age Dependency:
- 34.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Custer County, Montana
The median age in Custer County, Montana is 42.7 years.
According to latest Census data, the total population of Custer County, Montana is 11,961.
In Custer County, Montana, seniors (ages 65+) make up 20.8% of the population, while children under 18 represent 15.0%.
Based on historical data since 2010, the population in Custer County, Montana has remained stable.