Kosciusko Flag

Kosciusko

County:
Day County
County Seat:
No
Area (mi²):
39.605
State:
South Dakota

Kosciusko is located in Day County, South Dakota. Kosciusko has a 2025 population of 181 . Kosciusko is currently declining at a rate of -0.55% annually but its population has increased by 1.12% since the most recent census, which recorded a population of 179 in 2020.

The average household income in Kosciusko is $103,831 with a poverty rate of 4.26%. The median age in Kosciusko is 60.8 years: 63.2 years for males, and 60.2 years for females. For every 100 females there are 105.8 males.

181
Total Population
5
Density (mi²)
-1 -0.55%
Growth

Kosciusko Population

Kosciusko Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Kosciusko includes 96.1% White, and smaller percentages for and multiracial populations.

Population by Race

White (96.1%)

Two or more races (3.9%)

Race
Population
Percentage (of total)
White27196.1%
Two or more races113.9%

Kosciusko Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Kosciusko's average per capita income is $38,333. Household income levels show a median of $95,682. The poverty rate stands at 4.26%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Families$117,857$133,768
Married Families$117,857-
Households$95,682$103,831
Non Families-$38,511

$38,333

Average Income

$95,682

Median Household Income

4.26%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)