Jefferson township

County:: Union County
County Seat:: No
Area (mi²):: 38.794
State:: South Dakota

Jefferson township is located in Union County, South Dakota. Jefferson township has a 2025 population of 1,227. Jefferson township is currently growing at a rate of 2% annually and its population has increased by 10.54% since the most recent census, which recorded a population of 1,110 in 2020.

The average household income in Jefferson township is $186,665 with a poverty rate of 0%.The median age in Jefferson township is 43.7 years: 46.4 years for males, and 43.1 years for females.

Demographics

The racial composition of Jefferson township includes 99.04% White, and smaller percentages for other race and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	930	99.04%
Other race	9	0.96%

Jefferson township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Jefferson township's average per capita income is $100,885. Household income levels show a median of $172,083. The poverty rate stands at 0%.

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
Married Families	$215,792	-
Families	$215,592	$224,104
Households	$172,083	$186,665
Non Families	$63,339	$58,553

$100,885

Average Income

$172,083

Median Household Income

0%

Poverty Rate