Brown County, South Dakota Age & Gender Statistics (2024)

Total Population

37,877

Median Age

37.8

Male Median

36.8

Female Median

38.7

Brown County, South Dakota Population Growth

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

Brown County, South Dakota Demographic Trend

Since 2010, the population of has changed by +5.2%%.

+5.2%% Growth

Brown County, South Dakota Age & Gender Pyramid

Population pyramid for

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


Brown County, South Dakota Historical Population Data

YearMedian AgePopulation
202437.837,877
202337.838,079
202237.338,278
202137.038,471
202037.438,988
201937.038,915
201836.938,840
201737.338,637
201637.738,430
201538.138,060
201438.437,528
201338.936,982
201239.436,562
201139.236,265
201038.936,011

Brown County, South Dakota Age Group Breakdown (2024)

Age CohortPercentage
Under 55.6%
5–1718.0%
18–2410.6%
25–3411.6%
35–5423.5%
55–6413.0%
65+17.8%

Dependency Ratios for Brown County, South Dakota

Total Dependency Ratio:
70.6
Youth Dependency:
40.3
Old-Age Dependency:
30.3

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



Age & Gender FAQs for Brown County, South Dakota

The median age in Brown County, South Dakota is 37.8 years.

According to latest Census data, the total population of Brown County, South Dakota is 37,877.

In Brown County, South Dakota, seniors (ages 65+) make up 17.8% of the population, while children under 18 represent 18.0%.

Based on historical data since 2010, the population in Brown County, South Dakota has remained stable.
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