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Where 57621 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 57621 into a pocket calculator and turn it upside down: IZgLS — not quite a word, sorry.
- ➕ As a number, 57,621 = 3 × 19207. Its digits add up to 21, a total 2,594 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000100010101 - 🏠 Its numerical neighbours: 57620 (Bison, SD, 76 mi away) and 57622 (Cherry Creek, SD, 79 mi away).
- 🔄 Backwards, 57621 becomes 12675, which is not a ZIP code at all.
- 👥 56 other ZIP codes are made of exactly the same digits (12567, 12765, 15267, 15276, 15627, 15672, …). The farthest-flung twin is 12567 in Pine Plains, NY, 1,384 miles away.
- 🧭 Farther north than 93% of all ZIP codes, and farther west than 80%.
- 🎯430 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57621 and you would come out at 45.77°S, 78.92°E — 475 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 43m of daylight. Shortest: 8h 40m.
- 📏 At 3.1 square miles of land, 57621 is bigger than 14% of ZIP codes — room for about 2.3 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 294This ZIP294 |
|---|---|
| Households | 57This ZIP57 |
| Housing units | 63This ZIP63 |
| Median age | 19.7This ZIP19.7South Dakota38.0US 38.9 |
| Median household income | $32,589This ZIP$32,589South Dakota$75,081US $80,734 |
| Median gross rent | $592This ZIP$592South Dakota$946US $1,413 |
| Bachelor's degree or higher | 8.9%This ZIP8.9% |
| Mean commute | 24.9 minThis ZIP24.9 min |
| Population density | 95.9 / sq miThis ZIP95.9 / sq mi |
Land area
| Land area | 3.07 sq miThis ZIP3.07 sq mi |
|---|---|
| Water area | 0.10 sq miThis ZIP0.10 sq mi |
Other place names in 57621
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57621
| ZIP | City | Distance |
|---|---|---|
57659 | Walker, SD | 8.2 mi |
57641 | Mc Intosh, SD | 14.0 mi |
57639 | Little Eagle, SD | 14.7 mi |
57642 | Mc Laughlin, SD | 17.7 mi |
57660 | Watauga, SD | 22.0 mi |
57657 | Trail City, SD | 22.4 mi |
58568 | Selfridge, ND | 22.8 mi |
57656 | Timber Lake, SD | 24.2 mi |
57658 | Wakpala, SD | 26.0 mi |
58538 | Fort Yates, ND | 29.4 mi |
Find every ZIP code within 10 miles of 57621 →
Questions about this ZIP code
Where is ZIP code 57621?
57621 is in Bullhead, South Dakota, in Corson County. Its published point location is 45.7728, -101.0814.
What county is 57621 in?
57621 lies in Corson County.
What area code is 57621?
Bullhead uses area code 605, from NANPA's telephone records.
What time zone is 57621 in?
57621 uses America/Denver.
How many people live in 57621?
About 294 people live in ZIP code 57621, in 57 households, at 95.9 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 57621?
$32,589 a year, against $75,081 across South Dakota.
What ZIP codes are near 57621?
The closest are 57659 (8.2 mi), 57641 (14 mi), 57639 (14.7 mi), 57642 (17.7 mi) and 57660 (22 mi).
Is 57621 a PO Box ZIP code?
57621 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57621 ZIP Code — Bullhead, South Dakota (Corson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57621
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57621.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.