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Where 57633 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 57633 into a pocket calculator and turn it upside down: EEgLS — not quite a word, sorry.
- ➕ As a number, 57,633 = 3 × 19211. Its digits add up to 24, a total 2,425 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000100100001 - 🏠 Its numerical neighbours: 57632 (Herreid, SD, 77 mi away) and 57634 (Keldron, SD, 28 mi away).
- 🔄 Backwards, 57633 becomes 33675 — and that is a real ZIP code: Tampa, FL, 1,602 miles away.
- 👥 25 other ZIP codes are made of exactly the same digits (33567, 33576, 33675, 33756, 33765, 35673, …). The farthest-flung twin is 33567 in Plant City, FL, 1,611 miles away.
- 🧭 Farther north than 92% of all ZIP codes, and farther west than 80%.
- 🎯416 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57633 and you would come out at 45.44°S, 78.47°E — 470 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 41m of daylight. Shortest: 8h 42m.
- 📏 At 812.6 square miles of land, 57633 is bigger than 99% of ZIP codes — room for about 617 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 445This ZIP445 |
|---|---|
| Households | 183This ZIP183 |
| Housing units | 209This ZIP209 |
| Median age | 36.5This ZIP36.5South Dakota38.0US 38.9 |
| Median household income | $78,750This ZIP$78,750South Dakota$75,081US $80,734 |
| Median home value | $70,000This ZIP$70,000South Dakota$257,400US $332,700 |
| Median gross rent | $818This ZIP$818South Dakota$946US $1,413 |
| Bachelor's degree or higher | 20.9%This ZIP20.9% |
| Mean commute | 16.5 minThis ZIP16.5 min |
| Population density | 0.5 / sq miThis ZIP0.5 / sq mi |
Business and tax activity
| Business establishments | 19This ZIP19 |
|---|---|
| Employees | 99This ZIP99 |
| Annual payroll | $4,225,000This ZIP$4,225,000 |
| Tax returns filed | 210This ZIP210 |
| Total adjusted gross income | $12,164,000This ZIP$12,164,000 |
Land area
| Land area | 812.64 sq miThis ZIP812.64 sq mi |
|---|---|
| Water area | 2.72 sq miThis ZIP2.72 sq mi |
Counties 57633 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Corson County | 44.3% |
| Ziebach County | 34.5% |
| Dewey County | 21.2% |
Other place names in 57633
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57633
| ZIP | City | Distance |
|---|---|---|
57656 | Timber Lake, SD | 20.7 mi |
57660 | Watauga, SD | 27.0 mi |
57644 | Meadow, SD | 27.3 mi |
57634 | Keldron, SD | 28.0 mi |
57636 | Lantry, SD | 28.6 mi |
57661 | Whitehorse, SD | 29.5 mi |
57623 | Dupree, SD | 30.0 mi |
57621 | Bullhead, SD | 31.6 mi |
57641 | Mc Intosh, SD | 33.2 mi |
57645 | Morristown, SD | 33.4 mi |
Find every ZIP code within 10 miles of 57633 →
Questions about this ZIP code
Where is ZIP code 57633?
57633 is in Isabel, South Dakota, in Corson County. Its published point location is 45.4416, -101.5324.
What county is 57633 in?
57633 spans 3 counties: Corson County, Ziebach County and Dewey County. Most of it falls in Corson 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 57633?
Isabel uses area code 605, from NANPA's telephone records.
What time zone is 57633 in?
57633 uses America/Denver.
How many people live in 57633?
About 445 people live in ZIP code 57633, in 183 households, at 0.5 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 57633?
$78,750 a year, against $75,081 across South Dakota.
What ZIP codes are near 57633?
The closest are 57656 (20.7 mi), 57660 (27 mi), 57644 (27.3 mi), 57634 (28 mi) and 57636 (28.6 mi).
Is 57633 a PO Box ZIP code?
57633 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57633 ZIP Code — Isabel, South Dakota (Corson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57633
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57633.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.