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zipcodes.pro — ZIP/57730

57730

ZIP 57730 is Custer, South Dakota, mostly in Custer County; area code 605; Mountain time.

Type
Standard
Time zone
America/Denver
County
Custer +1 more
Metro area
Rapid City, SD
Population
5,596
Coordinates
43.7266, -103.6486
☼ Live from 57730 — Custer, SD

Weather right now

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Local time: —

Where 57730 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 57730
  • 🔢 Type 57730 into a pocket calculator and turn it upside down: OELLS — not quite a word, sorry.
  • ➕ As a number, 57,730 = 2 × 5 × 23 × 251. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110000110000010
  • 🏠 Its numerical neighbours: 57725 (Caputa, SD, 45 mi away) and 57732 (Deadwood, SD, 42 mi away).
  • 🔄 Backwards, 57730 becomes 03775, which is not a ZIP code at all.
  • 👥 33 other ZIP codes are made of exactly the same digits (05737, 05773, 07735, 07753, 30577, 30757, …). The farthest-flung twin is 07753 in Neptune, NJ, 1,530 miles away.
  • 🧭 Farther north than 86% of all ZIP codes, and farther west than 82%.
  • 🎯375 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 57730 and you would come out at 43.73°S, 76.35°E — 485 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 27m of daylight. Shortest: 8h 55m.
  • 📏 At 516.2 square miles of land, 57730 is bigger than 98% of ZIP codes — room for about 392 Central Parks.
🌙 The sky over 57730 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population5,596This ZIP5,596
Households2,733This ZIP2,733
Housing units3,346This ZIP3,346
Median age57.9This ZIP57.9South Dakota38.0US 38.9
Median household income$83,469This ZIP$83,469South Dakota$75,081US $80,734
Median home value$378,800This ZIP$378,800South Dakota$257,400US $332,700
Median gross rent$1,087This ZIP$1,087South Dakota$946US $1,413
Bachelor's degree or higher34.0%This ZIP34.0%
Mean commute26.1 minThis ZIP26.1 min
Population density10.8 / sq miThis ZIP10.8 / sq mi

Business and tax activity

Business establishments242This ZIP242
Employees1,254This ZIP1,254
Annual payroll$62,118,000This ZIP$62,118,000
Tax returns filed2,880This ZIP2,880
Total adjusted gross income$265,956,000This ZIP$265,956,000

Land area

Land area516.16 sq miThis ZIP516.16 sq mi
Water area0.61 sq miThis ZIP0.61 sq mi

Counties 57730 spans

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

CountyShare of this ZIP
Custer County 91.7%
Pennington County 8.3%

Other place names in 57730

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

ZIP codes near 57730

ZIPCityDistance
57773 Pringle, SD 9.6 mi
57751 Keystone, SD 14.8 mi
57745 Hill City, SD 21.0 mi
57702 Rapid City, SD 24.1 mi
57738 Fairburn, SD 24.6 mi
57747 Hot Springs, SD 25.2 mi
57709 Rapid City, SD 29.3 mi
57744 Hermosa, SD 31.0 mi
57735 Edgemont, SD 32.0 mi
57718 Black Hawk, SD 33.7 mi

Find every ZIP code within 10 miles of 57730 →

Questions about this ZIP code

Where is ZIP code 57730?

57730 is in Custer, South Dakota, in Custer County, part of the Rapid City, SD metropolitan area. Its published point location is 43.7266, -103.6486.

What county is 57730 in?

57730 spans 2 counties: Custer County and Pennington County. Most of it falls in Custer 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 57730?

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

What time zone is 57730 in?

57730 uses America/Denver.

How many people live in 57730?

About 5,596 people live in ZIP code 57730, in 2,733 households, at 10.8 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 57730?

$83,469 a year, against $75,081 across South Dakota.

What ZIP codes are near 57730?

The closest are 57773 (9.6 mi), 57751 (14.8 mi), 57745 (21 mi), 57702 (24.1 mi) and 57738 (24.6 mi).

Is 57730 a PO Box ZIP code?

57730 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “57730 ZIP Code — Custer, South Dakota (Custer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57730

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