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, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Asian

Other race

Native American

Black or African American

Native Hawaiian or Pacific Islander

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%
Black or African American	0	0%
Native Hawaiian or Pacific Islander	0	0%

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