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zipcodes.pro — ZIP/57481

57481

ZIP 57481 is Westport, South Dakota, mostly in Brown County; area code 605; Central time.

Type
Standard
Time zone
America/Chicago
County
Brown +2 more
Metro area
Aberdeen, SD
Population
271
Coordinates
45.6626, -98.6830
☼ Live from 57481 — Westport, SD

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Local time: —

Where 57481 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 57481
  • 🔢 Type 57481 into a pocket calculator and turn it upside down: IBhLS — not quite a word, sorry.
  • ➕ As a number, 57,481 = 47 × 1223. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110000010001001
  • 🏠 Its numerical neighbours: 57479 (Warner, SD, 27 mi away) and 57501 (Pierre, SD, 112 mi away).
  • 🔄 Backwards, 57481 becomes 18475, which is not a ZIP code at all.
  • 👥 41 other ZIP codes are made of exactly the same digits (14758, 14785, 14857, 15478, 15748, 15784, …). The farthest-flung twin is 78541 in Edinburg, TX, 1,328 miles away.
  • 🧭 Farther north than 93% of all ZIP codes, and farther west than 78%.
  • 🎯403 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 57481 and you would come out at 45.66°S, 81.32°E — 576 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 188.5 square miles of land, 57481 is bigger than 90% of ZIP codes — room for about 143 Central Parks.
🌙 The sky over 57481 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population271This ZIP271
Households121This ZIP121
Housing units149This ZIP149
Median age54.2This ZIP54.2South Dakota38.0US 38.9
Median household income$68,125This ZIP$68,125South Dakota$75,081US $80,734
Median home value$215,600This ZIP$215,600South Dakota$257,400US $332,700
Bachelor's degree or higher12.4%This ZIP12.4%
Mean commute20.5 minThis ZIP20.5 min
Population density1.4 / sq miThis ZIP1.4 / sq mi

Business and tax activity

Business establishments11This ZIP11
Employees48This ZIP48
Annual payroll$3,735,000This ZIP$3,735,000
Tax returns filed250This ZIP250
Total adjusted gross income$15,197,000This ZIP$15,197,000

Land area

Land area188.49 sq miThis ZIP188.49 sq mi
Water area0.30 sq miThis ZIP0.30 sq mi

Counties 57481 spans

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

CountyShare of this ZIP
Brown County 56.5%
McPherson County 31.3%
Edmunds County 12.3%

Other place names in 57481

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

ZIP codes near 57481

ZIPCityDistance
57426 Barnard, SD 10.4 mi
57441 Frederick, SD 14.0 mi
57401 Aberdeen, SD 14.4 mi
57456 Leola, SD 15.8 mi
57402 Aberdeen, SD 16.8 mi
57433 Columbia, SD 17.6 mi
57451 Ipswich, SD 19.8 mi
57427 Bath, SD 21.7 mi
58439 Forbes, ND 22.3 mi
57449 Houghton, SD 24.9 mi

Find every ZIP code within 10 miles of 57481 →

Questions about this ZIP code

Where is ZIP code 57481?

57481 is in Westport, South Dakota, in Brown County, part of the Aberdeen, SD micropolitan area. Its published point location is 45.6626, -98.6830.

What county is 57481 in?

57481 spans 3 counties: Brown County, McPherson County and Edmunds County. Most of it falls in Brown 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 57481?

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

What time zone is 57481 in?

57481 uses America/Chicago.

How many people live in 57481?

About 271 people live in ZIP code 57481, in 121 households, at 1.4 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 57481?

$68,125 a year, against $75,081 across South Dakota.

What ZIP codes are near 57481?

The closest are 57426 (10.4 mi), 57441 (14 mi), 57401 (14.4 mi), 57456 (15.8 mi) and 57402 (16.8 mi).

Is 57481 a PO Box ZIP code?

57481 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “57481 ZIP Code — Westport, South Dakota (Brown County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57481

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