Oglala Lakota County, South Dakota Age & Gender Statistics (2024)

Total Population

13,491

Median Age

28.2

Male Median

24.7

Female Median

29.9

Oglala Lakota County, South Dakota Population Growth

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

Oglala Lakota County, South Dakota Demographic Trend

Since 2010, the population of has changed by -4.7%%.

-4.7%% Growth

Oglala Lakota County, South Dakota Age & Gender Pyramid

Population pyramid for

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


Oglala Lakota County, South Dakota Historical Population Data

YearMedian AgePopulation
202428.213,491
202327.013,587
202226.313,695
202126.813,835
202026.514,277
201925.814,335
201825.314,335
201725.214,291
201624.614,263
201525.114,153

Oglala Lakota County, South Dakota Age Group Breakdown (2024)

Age CohortPercentage
Under 58.8%
5–1726.6%
18–2411.8%
25–3414.5%
35–5421.1%
55–649.7%
65+7.5%

Dependency Ratios for Oglala Lakota County, South Dakota

Total Dependency Ratio:
75.2
Youth Dependency:
62.0
Old-Age Dependency:
13.2

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



Age & Gender FAQs for Oglala Lakota County, South Dakota

The median age in Oglala Lakota County, South Dakota is 28.2 years.

According to latest Census data, the total population of Oglala Lakota County, South Dakota is 13,491.

In Oglala Lakota County, South Dakota, seniors (ages 65+) make up 7.5% of the population, while children under 18 represent 26.6%.

Based on historical data since 2010, the population in Oglala Lakota County, South Dakota is aging.
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