ZIP code 57231: De Smet, SD
57231 is a ZIP code in De Smet, South Dakota, mainly in Kingsbury County. About 1,724 people live here.
- Population
- 1,724
- Median household income
- $78,646
- Typical home value
- $250,000+2.7% in 12 months
- Median rent
- $725gross, per month
- Median age
- 44.2
- Homeowners
- 86.7%of occupied homes
Shaded: ZIP code 57231's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 57231 details
| City | De Smet |
|---|---|
| State | South Dakota |
| County | Kingsbury County |
| Metro area | Not in a metro or micro area |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 249.3 sq mi, plus 12.9 sq mi of water |
| Population density | 7 people per sq mi |
| Bachelor's degree or higher | 24.8% of adults 25+ |
| Average commute | 13.5 minutes |
| Center coordinates | 44.37582, -97.58228 |
Median rent in 57231 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $336/mo |
| 2 bedrooms | $850/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 57231
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 57249 | Lake Preston, SD | 10.5 mi | 1,023 |
| 57353 | Iroquois, SD | 12.5 mi | 812 |
| 57233 | Erwin, SD | 12.9 mi | 350 |
| 57051 | Oldham, SD | 15.8 mi | 163 |
| 57323 | Carthage, SD | 16.1 mi | 126 |
| 57221 | Bryant, SD | 17.5 mi | 1,158 |
| 57278 | Willow Lake, SD | 19.5 mi | 1,011 |
| 57214 | Badger, SD | 20.4 mi | 162 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 57231?
A typical home in ZIP code 57231 is worth about $250,000 (Zillow Home Value Index). The median household here earns $78,646 a year. See what buying here would cost per month, with South Dakota average taxes and insurance filled in.
Monthly payment for a $250,000 homeWhat can a $78,646 income afford?Rental property numbers
About ZIP code 57231
What city is ZIP code 57231?
ZIP code 57231 is in De Smet, SD, in Kingsbury County.
What county is ZIP code 57231 in?
57231 is mainly in Kingsbury County, South Dakota.
What is the population of ZIP code 57231?
About 1,724 people live in ZIP code 57231, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 57231 in?
57231 is in Central Time (UTC−6). It observes daylight saving time.