Sully County, SD Population

Overview

1,279

Total Population

51.6

Median age

43.00%

Female population %

132.5:100

Gender ratio (M:F)

55-59 years

Largest age group

68.5

Total dependency ratio

White

Largest racial group

2

Hispanic population

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

TABLE OF CONTENTS

Age

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

The median age in Sully County is 51.6, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Sully County's population under 18 was 18.53%, compared to the 22.51% nationwide.
Sully County's elderly or the senior population (over 65 age) was 25.49% as compared to 16.04% nationwide.
Of the total population in Sully County, 15.17% were under the age of 15, 11.81% aged 15 to 29, 47.54% aged 30 to 64, 23.77% aged 65 to 84, and 1.72% were 85 years of age and older.

There are 179 less females than males in Sully County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 43.00% females and 57.00% males in Sully County, SD.
The Sully County, SD gender ratio is 132.5:100 i.e. 132.5 men to 100 women (1.325).
For male population, the largest age group is 45-49 years with a population of 79.
For the female population, the largest age group is 55-59 years with a population of 62.

Sully County's population has become increasingly diverse:

Racial distribution of Sully County population: 94.14% are White, 0.70% are Black or African American, 1.17% are American Indian and Alaska Native and 3.99% are multiracial.
Sully County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 2 is Hispanic or Latino (of any race), and 1,259 (98.44% of the total population) is Non-Hispanic.
The largest racial group in Sully County is White with a population of 1,204 (94.14% of the total population).

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

The peak population was 1,545 in the year 2000
From 2000 to 2010, Sully County's population decreased by 168 (10.87%), as compared to the national growth of 9.63%.
From 2010 to 2020, Sully County's population increased by 75 (5.45%), 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, Sully County's population was lowest in year 2009 at 1,352.