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Where 57634 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 57634 into a pocket calculator and turn it upside down: hEgLS — not quite a word, sorry.
- ➕ As a number, 57,634 = 2 × 28817. Its digits add up to 25, a total 2,242 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000100100010 - 🏠 Its numerical neighbours: 57633 (Isabel, SD, 28 mi away) and 57636 (Lantry, SD, 55 mi away).
- 🔄 Backwards, 57634 becomes 43675, which is not a ZIP code at all.
- 👥 61 other ZIP codes are made of exactly the same digits (34756, 35476, 35647, 35674, 35746, 35764, …). The farthest-flung twin is 34756 in Montverde, FL, 1,617 miles away.
- 🧭 Farther north than 93% of all ZIP codes, and farther west than 81%.
- 🎯443 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57634 and you would come out at 45.77°S, 78.13°E — 444 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 201.5 square miles of land, 57634 is bigger than 91% of ZIP codes — room for about 153 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 131This ZIP131 |
|---|---|
| Households | 32This ZIP32 |
| Housing units | 41This ZIP41 |
| Median age | 14.3This ZIP14.3South Dakota38.0US 38.9 |
| Median household income | $88,125This ZIP$88,125South Dakota$75,081US $80,734 |
| Median home value | $151,600This ZIP$151,600South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 45.9%This ZIP45.9% |
| Population density | 0.7 / sq miThis ZIP0.7 / sq mi |
Land area
| Land area | 201.50 sq miThis ZIP201.50 sq mi |
|---|---|
| Water area | 0.53 sq miThis ZIP0.53 sq mi |
ZIP codes near 57634
| ZIP | City | Distance |
|---|---|---|
57645 | Morristown, SD | 11.7 mi |
57660 | Watauga, SD | 16.6 mi |
57638 | Lemmon, SD | 18.9 mi |
57644 | Meadow, SD | 23.2 mi |
57633 | Isabel, SD | 28.0 mi |
57641 | Mc Intosh, SD | 28.0 mi |
57621 | Bullhead, SD | 37.8 mi |
57659 | Walker, SD | 38.0 mi |
58529 | Carson, ND | 39.2 mi |
57640 | Lodgepole, SD | 40.4 mi |
Find every ZIP code within 10 miles of 57634 →
Questions about this ZIP code
Where is ZIP code 57634?
57634 is in Keldron, South Dakota, in Corson County. Its published point location is 45.7732, -101.8656.
What county is 57634 in?
57634 lies in Corson County.
What area code is 57634?
Keldron uses area code 605, from NANPA's telephone records.
What time zone is 57634 in?
57634 uses America/Denver.
How many people live in 57634?
About 131 people live in ZIP code 57634, in 32 households, at 0.7 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 57634?
$88,125 a year, against $75,081 across South Dakota.
What ZIP codes are near 57634?
The closest are 57645 (11.7 mi), 57660 (16.6 mi), 57638 (18.9 mi), 57644 (23.2 mi) and 57633 (28 mi).
Is 57634 a PO Box ZIP code?
57634 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57634 ZIP Code — Keldron, South Dakota (Corson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57634
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57634.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.