Kosciusko township

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

Kosciusko township is located in Day County, South Dakota. Kosciusko township has a 2025 population of 184. Kosciusko township is currently growing at a rate of 0.55% annually and its population has increased by 3.37% since the most recent census, which recorded a population of 178 in 2020.

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

Demographics

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

Population by Race

Race	Population	Percentage (of total)
White	271	96.1%
Two or more races	11	3.9%

Kosciusko township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Kosciusko township'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