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, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander, Two or more races and multiracial populations.

Population by Race

White

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Two or more races

Race	Population	Percentage (of total)
White	930	99.04%
Other race	9	0.96%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Two or more races	0	0%

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