Erwin

County:: Kingsbury County
County Seat:: No
Area (mi²):: 0.476
State:: South Dakota

Erwin is a town located in Kingsbury County, South Dakota. Erwin has a 2025 population of 40. Erwin is currently declining at a rate of 0% annually and its population has increased by 2.56% since the most recent census, which recorded a population of 39 in 2020.

The average household income in Erwin is $57,761 with a poverty rate of 6%. The median age in Erwin is 55.5 years: 59 years for males, and 47.5 years for females.

Demographics

The racial composition of Erwin includes 100% White, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander, other race, Two or more races and multiracial populations.

Population by Race

White

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Two or more races

Race	Population	Percentage (of total)
White	50	100%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%
Two or more races	0	0%

Erwin Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Erwin's average per capita income is $28,542. Household income levels show a median of $53,750. The poverty rate stands at 6%.

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
Families	$58,125	$56,073
Married Families	$58,125	-
Households	$53,750	$57,761
Non Families	-	$60,414

$28,542

Average Income

$53,750

Median Household Income

6%

Poverty Rate