Foster County, North Dakota Age & Gender Statistics (2024)

Total Population

3,358

Median Age

43.4

Male Median

41.6

Female Median

48.8

Foster County, North Dakota Population Growth

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

Foster County, North Dakota Demographic Trend

Since 2010, the population of has changed by -2.2%%.

-2.2%% Growth

Foster County, North Dakota Age & Gender Pyramid

Population pyramid for

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


Foster County, North Dakota Historical Population Data

YearMedian AgePopulation
202443.43,358
202343.33,372
202245.13,388
202144.23,396
202044.33,231
201944.83,260
201845.63,290
201746.43,318
201646.73,345
201546.93,366
201446.43,364
201346.13,355
201245.73,368
201146.33,389
201045.83,434

Foster County, North Dakota Age Group Breakdown (2024)

Age CohortPercentage
Under 55.8%
5–1716.0%
18–243.6%
25–3413.7%
35–5422.7%
55–6414.1%
65+24.1%

Dependency Ratios for Foster County, North Dakota

Total Dependency Ratio:
84.8
Youth Dependency:
40.2
Old-Age Dependency:
44.6

The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).



Age & Gender FAQs for Foster County, North Dakota

The median age in Foster County, North Dakota is 43.4 years.

According to latest Census data, the total population of Foster County, North Dakota is 3,358.

In Foster County, North Dakota, seniors (ages 65+) make up 24.1% of the population, while children under 18 represent 16.0%.

Based on historical data since 2010, the population in Foster County, North Dakota is becoming younger.
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