Day County, SD Population

Overview

5,487

Total Population

47.3

Median age

48.97%

Female population %

104.2:100

Gender ratio (M:F)

65-69 years

Largest age group

76.8

Total dependency ratio

White

Largest racial group

135

Hispanic population

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

TABLE OF CONTENTS

Age

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

The median age in Day County is 47.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Day County's population under 18 was 22.93%, compared to the 22.51% nationwide.
Day County's elderly or the senior population (over 65 age) was 25.62% as compared to 16.04% nationwide.
Of the total population in Day County, 17.81% were under the age of 15, 15.62% aged 15 to 29, 40.95% aged 30 to 64, 21.51% aged 65 to 84, and 4.12% were 85 years of age and older.

There are 113 less females than males in Day County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 48.97% females and 51.03% males in Day County, SD.
The Day County, SD gender ratio is 104.2:100 i.e. 104.2 men to 100 women (1.042).
For male population, the largest age group is 65-69 years with a population of 265.
For the female population, the largest age group is 15-19 years with a population of 228.

Day County's population has become increasingly diverse:

Racial distribution of Day County population: 86.09% are White, 0.07% are Black or African American, 10.84% are American Indian and Alaska Native, 0.07% are Asian, 0.84% are some other race and 2.08% are multiracial.
Day County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 135 is Hispanic or Latino (of any race), and 5,352 (97.54% of the total population) is Non-Hispanic.
The largest racial group in Day County is White with a population of 4,724 (86.09% of the total population).

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

The peak population was 6,207 in the year 2000
From 2000 to 2010, Day County's population decreased by 497 (8.01%), as compared to the national growth of 9.63%.
From 2010 to 2020, Day County's population decreased by 268 (4.69%), 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, Day County's population was lowest in year 2019 at 5,414.