Weather right now
Asking the National Weather Service…
Where 57430 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 57430 into a pocket calculator and turn it upside down: OEhLS — not quite a word, sorry.
- ➕ As a number, 57,430 = 2 × 5 × 5743. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000001010110 - 🏠 Its numerical neighbours: 57429 (Brentford, SD, 54 mi away) and 57432 (Claremont, SD, 18 mi away).
- 🔄 Backwards, 57430 becomes 03475, which is not a ZIP code at all.
- 👥 58 other ZIP codes are made of exactly the same digits (03457, 03574, 03745, 03754, 04357, 04537, …). The farthest-flung twin is 34705 in Astatula, FL, 1,470 miles away.
- 🧭 Farther north than 93% of all ZIP codes, and farther west than 76%.
- 🎯417 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57430 and you would come out at 45.83°S, 82.28°E — 611 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 44m of daylight. Shortest: 8h 39m.
- 📏 At 346.7 square miles of land, 57430 is bigger than 96% of ZIP codes — room for about 263 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,828This ZIP1,828 |
|---|---|
| Households | 756This ZIP756 |
| Housing units | 1,004This ZIP1,004 |
| Median age | 45.0This ZIP45.0South Dakota38.0US 38.9 |
| Median household income | $70,484This ZIP$70,484South Dakota$75,081US $80,734 |
| Median home value | $149,200This ZIP$149,200South Dakota$257,400US $332,700 |
| Median gross rent | $820This ZIP$820South Dakota$946US $1,413 |
| Bachelor's degree or higher | 23.2%This ZIP23.2% |
| Mean commute | 10.1 minThis ZIP10.1 min |
| Population density | 5.3 / sq miThis ZIP5.3 / sq mi |
Business and tax activity
| Business establishments | 96This ZIP96 |
|---|---|
| Employees | 1,037This ZIP1,037 |
| Annual payroll | $53,658,000This ZIP$53,658,000 |
| Tax returns filed | 1,010This ZIP1,010 |
| Total adjusted gross income | $86,304,000This ZIP$86,304,000 |
Land area
| Land area | 346.74 sq miThis ZIP346.74 sq mi |
|---|---|
| Water area | 3.47 sq miThis ZIP3.47 sq mi |
Counties 57430 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Marshall County | 99.1% |
| Sargent County | 0.9% |
Other place names in 57430
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57430
| ZIP | City | Distance |
|---|---|---|
57421 | Amherst, SD | 10.6 mi |
58043 | Havana, ND | 12.8 mi |
57247 | Lake City, SD | 15.0 mi |
57454 | Langford, SD | 15.6 mi |
58017 | Cogswell, ND | 15.7 mi |
58032 | Forman, ND | 17.0 mi |
57432 | Claremont, SD | 18.3 mi |
57270 | Veblen, SD | 18.7 mi |
58067 | Rutland, ND | 19.6 mi |
57446 | Hecla, SD | 21.0 mi |
Find every ZIP code within 10 miles of 57430 →
Questions about this ZIP code
Where is ZIP code 57430?
57430 is in Britton, South Dakota, in Marshall County. Its published point location is 45.8349, -97.7197.
What county is 57430 in?
57430 spans 2 counties: Marshall County and Sargent County. Most of it falls in Marshall 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 57430?
Britton uses area code 605, from NANPA's telephone records.
What time zone is 57430 in?
57430 uses America/Chicago.
How many people live in 57430?
About 1,828 people live in ZIP code 57430, in 756 households, at 5.3 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 57430?
$70,484 a year, against $75,081 across South Dakota.
What ZIP codes are near 57430?
The closest are 57421 (10.6 mi), 58043 (12.8 mi), 57247 (15 mi), 57454 (15.6 mi) and 58017 (15.7 mi).
Is 57430 a PO Box ZIP code?
57430 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57430 ZIP Code — Britton, South Dakota (Marshall County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57430
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57430.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.