Kosciusko township Flag

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 2026 population of 180. Kosciusko township is currently declining at a rate of -0.55% annually but its population has increased by 0.56% since the most recent census, which recorded a population of 179 in 2020.

The median household income in Kosciusko township is $105,139 with a poverty rate of 3.93%. The median age in Kosciusko township is 63.6 years: 63.1 years for males, and 65.8 years for females. For every 100 females there are 114.0 males.

180
Total Population
4.5
Density (mi²)
-1 -0.55%
Growth

Kosciusko township Population

Kosciusko township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026180-1-0.55%
2025181-1-0.55%
2024182-1-0.55%
202318310.55%
202218221.11%
202118010.56%
202017900%
2019164-2-1.2%
201816600%
201716610.61%
201616510.61%
201516410.61%
2014163-2-1.21%
201316500%
2012165-4-2.37%
201116921.2%
201016700%

Median Age

Overall: 63.6 years
Female: 65.8 years
Male: 63.1 years

Kosciusko township Adults

There are 210 adults, (109 of whom are seniors) in Kosciusko township.

Sex Ratio

Female: 107 (46.7%)
Male: 122 (53.3%)

Demographics

The racial composition of Kosciusko township includes 95.63% White, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White21995.63%
Two or more races104.37%
Race
Population ↓
Percentage (of total)
White21995.63%
Two or more races104.37%

Kosciusko township Marital Status

Economics and Income Statistics

Kosciusko township 's average per capita income is $70,250. Household income levels show a median of $105,139. The poverty rate stands at 3.93%.

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$122,143$143,170
Married Families$122,143-
Households$105,139$114,793
Non Families$21,146$24,772

$70,250

Average Income

$105,139

Median Household Income

3.93%

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)