Buffalo County, SD Population

Overview

1,974

Total Population

25.4

Median age

48.02%

Female population %

108.2:100

Gender ratio (M:F)

0-4 years

Largest age group

62.3

Total dependency ratio

American Indian and Alaska Native

Largest racial group

153

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Buffalo County's population is young compared to the rest of the country:

The median age in Buffalo County is 25.4, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Buffalo County's population under 18 was 38.30%, compared to the 22.51% nationwide.
Buffalo County's elderly or the senior population (over 65 age) was 7.50% as compared to 16.04% nationwide.
Of the total population in Buffalo County, 30.90% were under the age of 15, 24.52% aged 15 to 29, 37.08% aged 30 to 64, 7.14% aged 65 to 84, and 0.35% were 85 years of age and older.

There are 78 less females than males in Buffalo County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 48.02% females and 51.98% males in Buffalo County, SD.
The Buffalo County, SD gender ratio is 108.2:100 i.e. 108.2 men to 100 women (1.082).
For male population, the largest age group is 0-4 years with a population of 128.
For the female population, the largest age group is 0-4 years with a population of 111.

Buffalo County's population is moderately diverse:

Racial distribution of Buffalo County population: 14.44% are White, 83.84% are American Indian and Alaska Native, 0.81% are some other race and 0.91% are multiracial.
Buffalo County's racial breakdown clearly shows that there is an absolute majority of American Indian and Alaska Native population in the county.
By ethnicity, 153 is Hispanic or Latino (of any race), and 1,821 (92.25% of the total population) is Non-Hispanic.
The largest racial group in Buffalo County is American Indian and Alaska Native with a population of 1,655 (83.84% of the total population).

Buffalo County's population has already reached its peak and is showing a trend of decline:

The peak population was 2,133 in the year 2008
From 2000 to 2010, Buffalo County's population decreased by 62 (3.11%), as compared to the national growth of 9.63%.
From 2010 to 2020, Buffalo County's population increased by 4 (0.21%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Buffalo County's population was lowest in year 2022 at 1,861.