ZIP code 57231
Where is ZIP code 57231?
De Smet, South Dakota
Kingsbury County · Standard ZIP code
ZIP code 57231 belongs to De Smet, South Dakota in Kingsbury County. 57231 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Central Time zone and uses area code 605. About 1,724 people live in the 57231 area, where the median household income is $78,646. The closest ZIP codes are 57249 (Lake Preston, 9 mi east), 57233 (Erwin, 10.5 mi northeast) and 57353 (Iroquois, 14.6 mi west).
| ZIP code | 57231 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | De Smet |
| State | South Dakota (SD) |
| County | Kingsbury County |
| Time zone | Central Time · now |
| Area code | 605 |
| Coordinates | 44.3852, -97.5634 map |
| 3-digit prefix | 572 |
Population and income in 57231
| Population | 1,724 · higher than 78% of South Dakota ZIP codes |
|---|---|
| People per square mile | 7 · higher than 60% of South Dakota ZIP codes |
| Median age | 44.2 years · higher than 60% of South Dakota ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $78,646 · higher than 59% of South Dakota ZIP codes |
| Income per person | $41,058 |
| Below the poverty line | 8.8% |
| Bachelor’s degree or higher | 25% of adults 25+ |
| Median home value | $212,200 · higher than 63% of South Dakota ZIP codes |
| Median rent | $725 a month |
| Housing units | 877 |
| Households | 721 (2.32 people on average) |
| Owners / renters | 87% / 13% |
| Land area | 249.28 sq mi (plus 12.85 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 57231. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 57231
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 57249 | Lake Preston, SD | 9 mi E | Standard |
| 57233 | Erwin, SD | 10.5 mi NE | Standard |
| 57353 | Iroquois, SD | 14.6 mi W | Standard |
| 57221 | Bryant, SD | 15.7 mi N | Standard |
| 57051 | Oldham, SD | 17.4 mi SE | Standard |
| 57278 | Willow Lake, SD | 17.6 mi N | Standard |
| 57323 | Carthage, SD | 17.9 mi SW | Standard |
| 57214 | Badger, SD | 18.5 mi NE | PO Box only |
| 57248 | Lake Norden, SD | 22.6 mi NE | Standard |
| 57324 | Cavour, SD | 22.6 mi W | Standard |
| 57349 | Howard, SD | 24.1 mi S | Standard |
| 57271 | Vienna, SD | 24.3 mi N | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 57231 or measure the distance to another ZIP code.
How to address mail to 57231
123 MAIN ST
DE SMET SD 57231
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (57231-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 57231?
- 57231 is a De Smet, South Dakota ZIP code.
- What county is 57231 in?
- ZIP code 57231 is in Kingsbury County, South Dakota.
- What time zone is ZIP code 57231 in?
- 57231 is in the Central Time zone (America/Chicago).
- What area code is 57231?
- Phone numbers in ZIP code 57231 use area code 605.
- What is the population of ZIP code 57231?
- About 1,724 people live in ZIP code 57231, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 57231?
- The median household income in 57231 is $78,646 a year, higher than 59% of South Dakota ZIP codes.
- What ZIP codes are near 57231?
- The nearest ZIP codes to 57231 are 57249 (Lake Preston, 9 miles), 57233 (Erwin, 10.5 miles), 57353 (Iroquois, 14.6 miles) and 57221 (Bryant, 15.7 miles).