Big Sioux township

County:: Union County
County Seat:: No
Area (mi²):: 11.49
State:: South Dakota

Big Sioux township is located in Union County, South Dakota. Big Sioux township has a 2025 population of 5,203. Big Sioux township is currently growing at a rate of 1.82% annually and its population has increased by 10.21% since the most recent census, which recorded a population of 4,721 in 2020.

The average household income in Big Sioux township is $171,951 with a poverty rate of 5.36%.The median age in Big Sioux township is 42.5 years: 37.2 years for males, and 49.2 years for females.

Demographics

The racial composition of Big Sioux township includes 87.97% White, 3.4% Asian, and smaller percentages for other race, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	4,219	87.97%
Two or more races	323	6.73%
Asian	163	3.4%
Other race	52	1.08%
Native American	39	0.81%

Big Sioux township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Big Sioux township's average per capita income is $83,333. Household income levels show a median of $118,410. The poverty rate stands at 5.36%.

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	$149,250	-
Families	$142,422	$197,193
Households	$118,410	$171,951
Non Families	$63,452	$78,878

$83,333

Average Income

$118,410

Median Household Income

5.36%

Poverty Rate