Erwin Flag

Erwin

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

Erwin is a town located in Kingsbury County, South Dakota. Erwin has a 2026 population of 39. Erwin is currently declining at a rate of 0% annually and its population has increased by 2.63% since the most recent census, which recorded a population of 38 in 2020.

The median household income in Erwin is $86,250 with a poverty rate of 0%. The median age in Erwin is 19.9 years: 19.7 years for males, and 30.3 years for females. For every 100 females there are 144.2 males.

39
Total Population
82
Density (mi²)

Erwin Population

Erwin Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20263900%
20253900%
20243900%
20233900%
20223912.63%
20213800%
20203800%
20194412.33%
20184300%
201743-1-2.27%
20164400%
20154400%
20144400%
201344-2-4.35%
20124612.22%
20114500%
20104500%

Median Age

Overall: 19.9 years
Female: 30.3 years
Male: 19.7 years

Erwin Adults

There are 58 adults, (12 of whom are seniors) in Erwin.

Sex Ratio

Female: 43 (41%)
Male: 62 (59%)

Demographics

The racial composition of Erwin includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White105100%
Race
Population ↓
Percentage (of total)
White105100%

Erwin Marital Status

Economics and Income Statistics

Erwin 's average per capita income is $31,964. Household income levels show a median of $86,250. 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
Families$88,500$83,972
Married Families$88,333-
Households$86,250$75,677
Non Families$41,250$38,350

$31,964

Average Income

$86,250

Median Household Income

0%

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)