Kingsbury County, SD ZIP codes
There are 7 ZIP codes in Kingsbury County, SD, in 7 towns, from 57051 to 57353. The largest are 57212 (Arlington), 57231 (De Smet) and 57249 (Lake Preston).
The county seat is De Smet.
- ZIP codes
- 7
- Towns
- 7
- County seat
- De Smet
- County FIPS
46077- State
- South Dakota
- Population
- 5,244
- Median household income
- $74,000
- Land area
- 832 sq mi
Kingsbury County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Kingsbury County ZIP codes
The ZIP codes of Kingsbury County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Kingsbury County in numbers
About 5,244 people live in Kingsbury County, in 2,112 households, the 35th most populous of South Dakota's 66 counties. The median household income is $74,000 a year, about the same as the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $169,500 (34% below the South Dakota median), and median gross rent is $685 a month. The median age is 42.1; 23.1% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 21 minutes.
| Population | 5,244 |
|---|---|
| Households | 2,112 |
| Median age | 42.1 |
| Median household income | $74,000 |
| Median home value | $169,500 |
| Median gross rent | $685 |
| Bachelor's degree or higher | 23.1% |
| Mean commute | 20.8 min |
| Population density | 6 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Kingsbury County
| Town | ZIP codes | Population |
|---|---|---|
| De Smet | 1 | 943 |
| Arlington | 1 | 920 |
| Lake Preston | 1 | 596 |
| Iroquois | 1 | 389 |
| Badger | 1 | 162 |
| Erwin | 1 | 105 |
| Oldham | 1 | 75 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Kingsbury County.
- Brookings County (8)
- Beadle County (9)
- Lake County (7)
- Hamlin County (5)
- Clark County (6)
- Sanborn County (3)
- Miner County (4)
Not sure you are in Kingsbury County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Kingsbury County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
57051 | Oldham , SD | Standard | 163 | $56,250 | $112,500 |
57212 | Arlington , SD | Standard | 1,819 | $93,750 | $238,100 |
57214 | Badger , SD | Standard | 162 | $65,000 | $70,000 |
57231 | De Smet , SD | Standard | 1,724 | $78,646 | $212,200 |
57233 | Erwin , SD | Standard | 350 | $82,917 | — |
57249 | Lake Preston , SD | Standard | 1,023 | $63,182 | $193,300 |
57353 | Iroquois , SD | Standard | 812 | $75,625 | $139,300 |
Cite this page
zipcodes.pro. “Kingsbury County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/sd/county/kingsbury
Underlying data is public domain or openly licensed — sources, vintages and licences.