Weather right now
Asking the National Weather Service…
Where 57051 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 57051 into a pocket calculator and turn it upside down: ISOLS — not quite a word, sorry.
- ➕ As a number, 57,051 = 3 × 3 × 3 × 2113. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1101111011011011 - 🏠 Its numerical neighbours: 57050 (Nunda, SD, 17 mi away) and 57052 (Olivet, SD, 66 mi away).
- 🔄 Backwards, 57051 becomes 15075 — and that is a real ZIP code: Rural Ridge, PA, 927 miles away.
- 👥 28 other ZIP codes are made of exactly the same digits (05751, 15057, 15075, 15705, 15750, 17055, …). The farthest-flung twin is 05751 in Killington, VT, 1,218 miles away.
- 🧭 Farther north than 88% of all ZIP codes, and farther west than 75%.
- 🎯310 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57051 and you would come out at 44.22°S, 82.65°E — 685 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 31m of daylight. Shortest: 8h 51m.
- 📏 At 78.8 square miles of land, 57051 is bigger than 72% of ZIP codes — room for about 60 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 163This ZIP163 |
|---|---|
| Households | 95This ZIP95 |
| Housing units | 129This ZIP129 |
| Median age | 60.1This ZIP60.1South Dakota38.0US 38.9 |
| Median household income | $56,250This ZIP$56,250South Dakota$75,081US $80,734 |
| Median home value | $112,500This ZIP$112,500South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 26.4%This ZIP26.4% |
| Mean commute | 27.7 minThis ZIP27.7 min |
| Population density | 2.1 / sq miThis ZIP2.1 / sq mi |
Business and tax activity
| Business establishments | 10This ZIP10 |
|---|---|
| Employees | 52This ZIP52 |
| Annual payroll | $2,188,000This ZIP$2,188,000 |
| Tax returns filed | 120This ZIP120 |
| Total adjusted gross income | $10,166,000This ZIP$10,166,000 |
Land area
| Land area | 78.84 sq miThis ZIP78.84 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Counties 57051 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Kingsbury County | 77.7% |
| Miner County | 17.6% |
| Lake County | 4.6% |
Other place names in 57051
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57051
| ZIP | City | Distance |
|---|---|---|
57054 | Ramona, SD | 8.3 mi |
57249 | Lake Preston, SD | 11.5 mi |
57212 | Arlington, SD | 15.3 mi |
57061 | Sinai, SD | 15.3 mi |
57231 | De Smet, SD | 15.8 mi |
57050 | Nunda, SD | 16.9 mi |
57076 | Winfred, SD | 17.0 mi |
57349 | Howard, SD | 17.3 mi |
57323 | Carthage, SD | 18.7 mi |
57071 | Volga, SD | 19.6 mi |
Find every ZIP code within 10 miles of 57051 →
Questions about this ZIP code
Where is ZIP code 57051?
57051 is in Oldham, South Dakota, in Kingsbury County. Its published point location is 44.2174, -97.3507.
What county is 57051 in?
57051 spans 3 counties: Kingsbury County, Miner County and Lake County. Most of it falls in Kingsbury County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 57051?
Oldham uses area code 605, from NANPA's telephone records.
What time zone is 57051 in?
57051 uses America/Chicago.
How many people live in 57051?
About 163 people live in ZIP code 57051, in 95 households, at 2.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 57051?
$56,250 a year, against $75,081 across South Dakota.
What ZIP codes are near 57051?
The closest are 57054 (8.3 mi), 57249 (11.5 mi), 57212 (15.3 mi), 57061 (15.3 mi) and 57231 (15.8 mi).
Is 57051 a PO Box ZIP code?
57051 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57051 ZIP Code — Oldham, South Dakota (Kingsbury County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57051
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57051.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.