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

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

Stillwater County, Montana Demographic Trend

Since 2010, the population of has changed by +2.8%%.

+2.8%% Growth

Stillwater County, Montana Age & Gender Pyramid

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


Stillwater County, Montana Historical Population Data

YearMedian AgePopulation
202446.79,182
202347.49,052
202248.08,978
202148.38,916
202047.59,562
201946.89,466
201846.69,410
201746.59,342
201646.69,342
201546.79,288
201447.39,214
201347.09,173
201246.09,096
201145.49,026
201045.08,934

Stillwater County, Montana Age Group Breakdown (2024)

Age CohortPercentage
Under 54.2%
5–1716.8%
18–246.3%
25–349.3%
35–5423.2%
55–6415.0%
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.
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