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zipcodes.pro — ZIP/57631

57631

ZIP 57631 is Glenham, South Dakota, mostly in Walworth County; area code 605; Central time.

Type
Standard
Time zone
America/Chicago
County
Walworth +1 more
Metro area
none
Population
364
Coordinates
45.5891, -100.2961
☼ Live from 57631 — Glenham, SD

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Local time: —

Where 57631 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.

★ Weird and wonderful facts about 57631
  • 🔢 Type 57631 into a pocket calculator and turn it upside down: IEgLS — not quite a word, sorry.
  • ➕ As a number, 57,631 = 7 × 8233. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110000100011111
  • 🏠 Its numerical neighbours: 57630 (Glencross, SD, 32 mi away) and 57632 (Herreid, SD, 21 mi away).
  • 🔄 Backwards, 57631 becomes 13675 — and that is a real ZIP code: Plessis, NY, 1,195 miles away.
  • 👥 62 other ZIP codes are made of exactly the same digits (13657, 13675, 13756, 15367, 15376, 15637, …). The farthest-flung twin is 31567 in West Green, GA, 1,348 miles away.
  • 🧭 Farther north than 93% of all ZIP codes, and farther west than 80%.
  • 🎯407 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 57631 and you would come out at 45.59°S, 79.70°E — 513 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 42m of daylight. Shortest: 8h 41m.
  • 📏 At 130.0 square miles of land, 57631 is bigger than 84% of ZIP codes — room for about 99 Central Parks.
🌙 The sky over 57631 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population364This ZIP364
Households207This ZIP207
Housing units296This ZIP296
Median age60.7This ZIP60.7South Dakota38.0US 38.9
Median household income$56,827This ZIP$56,827South Dakota$75,081US $80,734
Median home value$162,500This ZIP$162,500South Dakota$257,400US $332,700
Bachelor's degree or higher21.6%This ZIP21.6%
Mean commute15.0 minThis ZIP15.0 min
Population density2.8 / sq miThis ZIP2.8 / sq mi

Business and tax activity

Business establishments6This ZIP6
Employees18This ZIP18
Annual payroll$737,000This ZIP$737,000
Tax returns filed170This ZIP170
Total adjusted gross income$16,884,000This ZIP$16,884,000

Land area

Land area130.04 sq miThis ZIP130.04 sq mi
Water area19.62 sq miThis ZIP19.62 sq mi

Counties 57631 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Walworth County 52.0%
Campbell County 48.0%

Other place names in 57631

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 57631

ZIPCityDistance
57646 Mound City, SD 13.1 mi
57658 Wakpala, SD 14.0 mi
57472 Selby, SD 14.3 mi
57601 Mobridge, SD 17.6 mi
57632 Herreid, SD 20.8 mi
57452 Java, SD 21.4 mi
57420 Akaska, SD 22.5 mi
57648 Pollock, SD 23.6 mi
57657 Trail City, SD 24.5 mi
57642 Mc Laughlin, SD 24.5 mi

Find every ZIP code within 10 miles of 57631 →

Questions about this ZIP code

Where is ZIP code 57631?

57631 is in Glenham, South Dakota, in Walworth County. Its published point location is 45.5891, -100.2961.

What county is 57631 in?

57631 spans 2 counties: Walworth County and Campbell County. Most of it falls in Walworth 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 57631?

Glenham uses area code 605, from NANPA's telephone records.

What time zone is 57631 in?

57631 uses America/Chicago.

How many people live in 57631?

About 364 people live in ZIP code 57631, in 207 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 57631?

$56,827 a year, against $75,081 across South Dakota.

What ZIP codes are near 57631?

The closest are 57646 (13.1 mi), 57658 (14 mi), 57472 (14.3 mi), 57601 (17.6 mi) and 57632 (20.8 mi).

Is 57631 a PO Box ZIP code?

57631 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “57631 ZIP Code — Glenham, South Dakota (Walworth County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57631

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