Union County, SD Population

Overview

16,424

Total Population

39.7

Median age

49.00%

Female population %

104.1:100

Gender ratio (M:F)

10-14 years

Largest age group

62.0

Total dependency ratio

White

Largest racial group

619

Hispanic population

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

TABLE OF CONTENTS

Age

Union County's population is old compared to the rest of the country:

The median age in Union County is 39.7, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Union County's population under 18 was 24.77%, compared to the 22.51% nationwide.
Union County's elderly or the senior population (over 65 age) was 17.94% as compared to 16.04% nationwide.
Of the total population in Union County, 20.32% were under the age of 15, 16.89% aged 15 to 29, 44.84% aged 30 to 64, 15.69% aged 65 to 84, and 2.25% were 85 years of age and older.

There are 330 less females than males in Union County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.00% females and 51.00% males in Union County, SD.
The Union County, SD gender ratio is 104.1:100 i.e. 104.1 men to 100 women (1.041).
For male population, the largest age group is 10-14 years with a population of 699.
For the female population, the largest age group is 55-59 years with a population of 612.

Union County's population has become increasingly diverse:

Racial distribution of Union County population: 91.95% are White, 0.41% are Black or African American, 1.19% are American Indian and Alaska Native, 1.46% are Asian, 0.76% are some other race and 4.23% are multiracial.
Union County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 619 is Hispanic or Latino (of any race), and 15,805 (96.23% of the total population) is Non-Hispanic.
The largest racial group in Union County is White with a population of 15,102 (91.95% of the total population).

Union County's population has not reached its peak yet and is showing a trend of further growth:

The peak population was 17,063 in the year 2022
From 2000 to 2010, Union County's population increased by 1,911 (15.19%), as compared to the national growth of 9.63%.
From 2010 to 2020, Union County's population increased by 2,365 (16.32%), 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, Union County's population was lowest in year 2000 at 12,577.