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Where 57540 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 57540 into a pocket calculator and turn it upside down: OhSLS — not quite a word, sorry.
- ➕ As a number, 57,540 = 2 × 2 × 3 × 5 × 7 × 137. Its digits add up to 21, a total 2,594 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000011000100 - 🏠 Its numerical neighbours: 57538 (Herrick, SD, 95 mi away) and 57541 (Ideal, SD, 62 mi away).
- 🔄 Backwards, 57540 becomes 04575 — and that is a real ZIP code: West Boothbay Harbor, ME, 1,477 miles away.
- 👥 26 other ZIP codes are made of exactly the same digits (04575, 05457, 05745, 40575, 40755, 45750, …). The farthest-flung twin is 04575 in West Boothbay Harbor, ME, 1,477 miles away.
- 🧭 Farther north than 89% of all ZIP codes, and farther west than 79%.
- 🎯324 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57540 and you would come out at 44.46°S, 80.39°E — 586 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 33m of daylight. Shortest: 8h 50m.
- 📏 At 198.5 square miles of land, 57540 is bigger than 91% of ZIP codes — room for about 151 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 223This ZIP223 |
|---|---|
| Households | 73This ZIP73 |
| Housing units | 83This ZIP83 |
| Median age | 53.3This ZIP53.3South Dakota38.0US 38.9 |
| Median home value | $258,300This ZIP$258,300South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 7.3%This ZIP7.3% |
| Mean commute | 24.7 minThis ZIP24.7 min |
| Population density | 1.1 / sq miThis ZIP1.1 / sq mi |
Land area
| Land area | 198.48 sq miThis ZIP198.48 sq mi |
|---|---|
| Water area | 2.72 sq miThis ZIP2.72 sq mi |
ZIP codes near 57540
| ZIP | City | Distance |
|---|---|---|
57536 | Harrold, SD | 8.8 mi |
57345 | Highmore, SD | 11.4 mi |
57346 | Stephan, SD | 16.5 mi |
57522 | Blunt, SD | 17.9 mi |
57371 | Ree Heights, SD | 19.1 mi |
57548 | Lower Brule, SD | 20.3 mi |
57339 | Fort Thompson, SD | 24.2 mi |
57362 | Miller, SD | 26.5 mi |
57564 | Onida, SD | 27.8 mi |
57467 | Orient, SD | 33.4 mi |
Find every ZIP code within 10 miles of 57540 →
Questions about this ZIP code
Where is ZIP code 57540?
57540 is in Holabird, South Dakota, in Hyde County. Its published point location is 44.4614, -99.6079.
What county is 57540 in?
57540 lies in Hyde County.
What area code is 57540?
Holabird uses area code 605, from NANPA's telephone records.
What time zone is 57540 in?
57540 uses America/Chicago.
How many people live in 57540?
About 223 people live in ZIP code 57540, in 73 households, at 1.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 57540?
The closest are 57536 (8.8 mi), 57345 (11.4 mi), 57346 (16.5 mi), 57522 (17.9 mi) and 57371 (19.1 mi).
Is 57540 a PO Box ZIP code?
57540 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57540 ZIP Code — Holabird, South Dakota (Hyde County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57540
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57540.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.