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Where 57551 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 57551 into a pocket calculator and turn it upside down: ISSLS — not quite a word, sorry.
- ➕ As a number, 57,551 = 13 × 19 × 233. Its digits add up to 23, a total 2,533 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000011001111 - 🏠 Its numerical neighbours: 57548 (Lower Brule, SD, 126 mi away) and 57552 (Midland, SD, 78 mi away).
- 🔄 Backwards, 57551 becomes 15575, which is not a ZIP code at all.
- 👥 9 other ZIP codes are made of exactly the same digits (15557, 17555, 51557, 51575, 55175, 55571, …). The farthest-flung twin is 17555 in Narvon, PA, 1,341 miles away.
- 🧭 Farther north than 84% of all ZIP codes, and farther west than 81%.
- 🎯283 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57551 and you would come out at 43.19°S, 78.29°E — 573 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 23m of daylight. Shortest: 8h 59m.
- 📏 At 753.1 square miles of land, 57551 is bigger than 98% of ZIP codes — room for about 572 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,084This ZIP2,084 |
|---|---|
| Households | 666This ZIP666 |
| Housing units | 833This ZIP833 |
| Median age | 36.0This ZIP36.0South Dakota38.0US 38.9 |
| Median household income | $70,096This ZIP$70,096South Dakota$75,081US $80,734 |
| Median home value | $161,900This ZIP$161,900South Dakota$257,400US $332,700 |
| Median gross rent | $613This ZIP$613South Dakota$946US $1,413 |
| Bachelor's degree or higher | 25.6%This ZIP25.6% |
| Mean commute | 12.5 minThis ZIP12.5 min |
| Population density | 2.8 / sq miThis ZIP2.8 / sq mi |
Business and tax activity
| Business establishments | 56This ZIP56 |
|---|---|
| Employees | 483This ZIP483 |
| Annual payroll | $19,012,000This ZIP$19,012,000 |
| Tax returns filed | 830This ZIP830 |
| Total adjusted gross income | $47,288,000This ZIP$47,288,000 |
Land area
| Land area | 753.13 sq miThis ZIP753.13 sq mi |
|---|---|
| Water area | 4.57 sq miThis ZIP4.57 sq mi |
Other place names in 57551
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57551
| ZIP | City | Distance |
|---|---|---|
57714 | Allen, SD | 14.1 mi |
57574 | Tuthill, SD | 16.9 mi |
57577 | Wanblee, SD | 23.1 mi |
57547 | Long Valley, SD | 25.0 mi |
57716 | Batesland, SD | 25.6 mi |
69218 | Merriman, NE | 29.2 mi |
57752 | Kyle, SD | 29.7 mi |
57750 | Interior, SD | 30.1 mi |
57560 | Norris, SD | 30.3 mi |
57572 | Saint Francis, SD | 30.9 mi |
Find every ZIP code within 10 miles of 57551 →
Questions about this ZIP code
Where is ZIP code 57551?
57551 is in Martin, South Dakota, in Bennett County. Its published point location is 43.1920, -101.7083.
What county is 57551 in?
57551 lies in Bennett County.
What area code is 57551?
Martin uses area code 605, from NANPA's telephone records.
What time zone is 57551 in?
57551 uses America/Denver.
How many people live in 57551?
About 2,084 people live in ZIP code 57551, in 666 households, at 2.8 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 57551?
$70,096 a year, against $75,081 across South Dakota.
What ZIP codes are near 57551?
The closest are 57714 (14.1 mi), 57574 (16.9 mi), 57577 (23.1 mi), 57547 (25 mi) and 57716 (25.6 mi).
Is 57551 a PO Box ZIP code?
57551 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57551 ZIP Code — Martin, South Dakota (Bennett County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57551
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57551.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.