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Where 57420 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 57420 into a pocket calculator and turn it upside down: OZhLS — not quite a word, sorry.
- ➕ As a number, 57,420 = 2 × 2 × 3 × 3 × 5 × 11 × 29. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000001001100 - 🏠 Its numerical neighbours: 57402 (Aberdeen, SD, 89 mi away) and 57421 (Amherst, SD, 113 mi away).
- 🔄 Backwards, 57420 becomes 02475 — and that is a real ZIP code: Arlington Heights, MA, 1,449 miles away.
- 👥 58 other ZIP codes are made of exactly the same digits (02457, 02475, 02574, 02745, 04257, 04275, …). The farthest-flung twin is 04572 in Waldoboro, ME, 1,504 miles away.
- 🧭 Farther north than 92% of all ZIP codes, and farther west than 80%.
- 🎯385 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57420 and you would come out at 45.28°S, 79.86°E — 531 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 39m of daylight. Shortest: 8h 44m.
- 📏 At 44.3 square miles of land, 57420 is bigger than 56% of ZIP codes — room for about 34 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 260This ZIP260 |
|---|---|
| Households | 107This ZIP107 |
| Housing units | 193This ZIP193 |
| Median age | 21.6This ZIP21.6South Dakota38.0US 38.9 |
| Median household income | $40,469This ZIP$40,469South Dakota$75,081US $80,734 |
| Median home value | $79,000This ZIP$79,000South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 36.9%This ZIP36.9% |
| Mean commute | 35.2 minThis ZIP35.2 min |
| Population density | 5.9 / sq miThis ZIP5.9 / sq mi |
Business and tax activity
| Business establishments | 3This ZIP3 |
|---|---|
| Employees | 9This ZIP9 |
| Annual payroll | $197,000This ZIP$197,000 |
Land area
| Land area | 44.27 sq miThis ZIP44.27 sq mi |
|---|---|
| Water area | 0.02 sq miThis ZIP0.02 sq mi |
Other place names in 57420
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57420
| ZIP | City | Distance |
|---|---|---|
57472 | Selby, SD | 10.2 mi |
57601 | Mobridge, SD | 11.5 mi |
57442 | Gettysburg, SD | 15.2 mi |
57450 | Hoven, SD | 16.1 mi |
57452 | Java, SD | 21.8 mi |
57631 | Glenham, SD | 22.5 mi |
57428 | Bowdle, SD | 25.5 mi |
57475 | Tolstoy, SD | 25.5 mi |
57646 | Mound City, SD | 27.8 mi |
57652 | Ridgeview, SD | 28.2 mi |
Find every ZIP code within 10 miles of 57420 →
Questions about this ZIP code
Where is ZIP code 57420?
57420 is in Akaska, South Dakota, in Walworth County. Its published point location is 45.2819, -100.1425.
What county is 57420 in?
57420 lies in Walworth County.
What area code is 57420?
Akaska uses area code 605, from NANPA's telephone records.
What time zone is 57420 in?
57420 uses America/Chicago.
How many people live in 57420?
About 260 people live in ZIP code 57420, in 107 households, at 5.9 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 57420?
$40,469 a year, against $75,081 across South Dakota.
What ZIP codes are near 57420?
The closest are 57472 (10.2 mi), 57601 (11.5 mi), 57442 (15.2 mi), 57450 (16.1 mi) and 57452 (21.8 mi).
Is 57420 a PO Box ZIP code?
57420 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57420 ZIP Code — Akaska, South Dakota (Walworth County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57420
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57420.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.