Big Sioux Flag

Big Sioux

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

Big Sioux is located in Union County, South Dakota. Big Sioux has a 2025 population of 5,274 . Big Sioux is currently growing at a rate of 2.51% annually and its population has increased by 11.76% since the most recent census, which recorded a population of 4,719 in 2020.

The average household income in Big Sioux is $171,951 with a poverty rate of 5.36%. The median age in Big Sioux is 42.5 years: 37.2 years for males, and 49.2 years for females. For every 100 females there are 110.5 males.

5.3K
Total Population
459
Density (mi²)
129 2.51%
Growth

Big Sioux Population

Big Sioux Population

Data after 2023 is projected based on recent change

Demographics

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

Population by Race

White (87.97%)

Two or more races (6.73%)

Asian (3.4%)

Other race (1.08%)

Native American (0.81%)

Race
Population
Percentage (of total)
White4,21987.97%
Two or more races3236.73%
Asian1633.4%
Other race521.08%
Native American390.81%

Big Sioux Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Big Sioux'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

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)