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Where 57755 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 57755 into a pocket calculator and turn it upside down: SSLLS — not quite a word, sorry.
- ➕ As a number, 57,755 = 5 × 11551. Its digits add up to 29, a total 1,296 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000110011011 - 🏠 Its numerical neighbours: 57754 (Lead, SD, 115 mi away) and 57756 (Manderson, SD, 187 mi away).
- 🔄 Backwards, 57755 becomes 55775 — and that is a real ZIP code: Pengilly, MN, 493 miles away.
- 👥 5 other ZIP codes are made of exactly the same digits (55577, 55757, 55775, 75755, 77555). The farthest-flung twin is 77555 in Galveston, TX, 1,235 miles away.
- 🧭 Farther north than 93% of all ZIP codes, and farther west than 82%.
- 🎯482 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57755 and you would come out at 45.87°S, 76.65°E — 384 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 44m of daylight. Shortest: 8h 39m.
- 📏 At 254.7 square miles of land, 57755 is bigger than 93% of ZIP codes — room for about 193 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 101This ZIP101 |
|---|---|
| Households | 45This ZIP45 |
| Housing units | 57This ZIP57 |
| Median age | 40.8This ZIP40.8South Dakota38.0US 38.9 |
| Median household income | $68,125This ZIP$68,125South Dakota$75,081US $80,734 |
| Median home value | $164,100This ZIP$164,100South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 39.0%This ZIP39.0% |
| Mean commute | 27.7 minThis ZIP27.7 min |
| Population density | 0.4 / sq miThis ZIP0.4 / sq mi |
Business and tax activity
| Business establishments | 3This ZIP3 |
|---|---|
| Employees | 16This ZIP16 |
| Annual payroll | $1,341,000This ZIP$1,341,000 |
Land area
| Land area | 254.67 sq miThis ZIP254.67 sq mi |
|---|---|
| Water area | 0.30 sq miThis ZIP0.30 sq mi |
ZIP codes near 57755
| ZIP | City | Distance |
|---|---|---|
57650 | Ralph, SD | 15.3 mi |
58653 | Scranton, ND | 18.6 mi |
58623 | Bowman, ND | 20.5 mi |
57720 | Buffalo, SD | 25.6 mi |
58649 | Reeder, ND | 28.4 mi |
57651 | Reva, SD | 31.0 mi |
57640 | Lodgepole, SD | 31.7 mi |
58651 | Rhame, ND | 33.0 mi |
57649 | Prairie City, SD | 35.6 mi |
58639 | Hettinger, ND | 36.2 mi |
Find every ZIP code within 10 miles of 57755 →
Questions about this ZIP code
Where is ZIP code 57755?
57755 is in Ludlow, South Dakota, in Harding County. Its published point location is 45.8683, -103.3472.
What county is 57755 in?
57755 lies in Harding County.
What time zone is 57755 in?
57755 uses America/Denver.
How many people live in 57755?
About 101 people live in ZIP code 57755, in 45 households, at 0.4 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 57755?
$68,125 a year, against $75,081 across South Dakota.
What ZIP codes are near 57755?
The closest are 57650 (15.3 mi), 58653 (18.6 mi), 58623 (20.5 mi), 57720 (25.6 mi) and 58649 (28.4 mi).
Is 57755 a PO Box ZIP code?
57755 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57755 ZIP Code — Ludlow, South Dakota (Harding County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57755
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57755.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.