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Where 57620 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 57620 into a pocket calculator and turn it upside down: OZgLS — not quite a word, sorry.
- ➕ As a number, 57,620 = 2 × 2 × 5 × 43 × 67. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000100010100 - 🏠 Its numerical neighbours: 57601 (Mobridge, SD, 106 mi away) and 57621 (Bullhead, SD, 76 mi away).
- 🔄 Backwards, 57620 becomes 02675 — and that is a real ZIP code: Yarmouth Port, MA, 1,627 miles away.
- 👥 69 other ZIP codes are made of exactly the same digits (02576, 02657, 02675, 05672, 05762, 06725, …). The farthest-flung twin is 02675 in Yarmouth Port, MA, 1,627 miles away.
- 🧭 Farther north than 92% of all ZIP codes, and farther west than 81%.
- 🎯433 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57620 and you would come out at 45.38°S, 77.46°E — 436 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 40m of daylight. Shortest: 8h 43m.
- 📏 At 348.2 square miles of land, 57620 is bigger than 96% of ZIP codes — room for about 264 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 564This ZIP564 |
|---|---|
| Households | 244This ZIP244 |
| Housing units | 319This ZIP319 |
| Median age | 43.0This ZIP43.0South Dakota38.0US 38.9 |
| Median household income | $90,500This ZIP$90,500South Dakota$75,081US $80,734 |
| Median home value | $106,300This ZIP$106,300South Dakota$257,400US $332,700 |
| Median gross rent | $932This ZIP$932South Dakota$946US $1,413 |
| Bachelor's degree or higher | 24.0%This ZIP24.0% |
| Mean commute | 11.4 minThis ZIP11.4 min |
| Population density | 1.6 / sq miThis ZIP1.6 / sq mi |
Business and tax activity
| Business establishments | 26This ZIP26 |
|---|---|
| Employees | 127This ZIP127 |
| Annual payroll | $8,001,000This ZIP$8,001,000 |
| Tax returns filed | 220This ZIP220 |
| Total adjusted gross income | $14,474,000This ZIP$14,474,000 |
Land area
| Land area | 348.17 sq miThis ZIP348.17 sq mi |
|---|---|
| Water area | 1.89 sq miThis ZIP1.89 sq mi |
Other place names in 57620
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57620
| ZIP | City | Distance |
|---|---|---|
57649 | Prairie City, SD | 16.8 mi |
57644 | Meadow, SD | 22.7 mi |
57651 | Reva, SD | 24.9 mi |
57758 | Mud Butte, SD | 28.1 mi |
57640 | Lodgepole, SD | 28.2 mi |
57626 | Faith, SD | 31.8 mi |
57638 | Lemmon, SD | 37.2 mi |
57650 | Ralph, SD | 39.4 mi |
57634 | Keldron, SD | 42.6 mi |
58639 | Hettinger, ND | 47.9 mi |
Find every ZIP code within 10 miles of 57620 →
Questions about this ZIP code
Where is ZIP code 57620?
57620 is in Bison, South Dakota, in Perkins County. Its published point location is 45.3773, -102.5402.
What county is 57620 in?
57620 lies in Perkins County.
What area code is 57620?
Bison uses area code 605, from NANPA's telephone records.
What time zone is 57620 in?
57620 uses America/Denver.
How many people live in 57620?
About 564 people live in ZIP code 57620, in 244 households, at 1.6 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 57620?
$90,500 a year, against $75,081 across South Dakota.
What ZIP codes are near 57620?
The closest are 57649 (16.8 mi), 57644 (22.7 mi), 57651 (24.9 mi), 57758 (28.1 mi) and 57640 (28.2 mi).
Is 57620 a PO Box ZIP code?
57620 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57620 ZIP Code — Bison, South Dakota (Perkins County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57620
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57620.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.