Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — ZIP/57709

57709

ZIP 57709 is in Rapid City, South Dakota, in Pennington County; area code 605; Mountain time. Rapid City has 4 ZIP codes; the others are 57701, 57702 and 57703.

Type
No street area
Time zone
America/Denver
County
Pennington
Metro area
Rapid City, SD
Coordinates
44.0761, -103.3171

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 57702, whose figures describe that area — not this ZIP code.

☼ Live from 57709 — Rapid City, SD

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Where 57709 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 57709
  • 🔢 Type 57709 into a pocket calculator and turn it upside down: GOLLS — not quite a word, sorry.
  • ➕ 57709 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 28, a total 1,520 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110000101101101
  • 🏠 Its numerical neighbours: 57706 (Ellsworth Afb, SD, 12 mi away) and 57714 (Allen, SD, 87 mi away).
  • 🔄 Backwards, 57709 becomes 90775, which is not a ZIP code at all.
  • 👥 19 other ZIP codes are made of exactly the same digits (09775, 57790, 59077, 59707, 70759, 75097, …). The farthest-flung twin is 09775 in APO AE, a military post office, 7,293 miles away.
  • 🧭 Farther north than 88% of all ZIP codes, and farther west than 82%.
  • 🎯381 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 57709 and you would come out at 44.08°S, 76.68°E — 476 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 30m of daylight. Shortest: 8h 52m.
🌙 The sky over 57709 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments60This ZIP60
Employees1,549This ZIP1,549
Annual payroll$67,609,000This ZIP$67,609,000

Land area

ZIP codes near 57709

ZIPCityDistance
57702 Rapid City, SD 5.8 mi
57701 Rapid City, SD 6.6 mi
57718 Black Hawk, SD 7.0 mi
57769 Piedmont, SD 11.8 mi
57706 Ellsworth Afb, SD 12.1 mi
57703 Rapid City, SD 14.5 mi
57751 Keystone, SD 15.3 mi
57759 Nemo, SD 15.8 mi
57719 Box Elder, SD 19.3 mi
57785 Sturgis, SD 23.4 mi

Find every ZIP code within 10 miles of 57709 →

Questions about this ZIP code

Where is ZIP code 57709?

57709 is in Rapid City, South Dakota, in Pennington County, part of the Rapid City, SD metropolitan area. Its published point location is 44.0761, -103.3171.

What county is 57709 in?

57709 lies in Pennington County.

What area code is 57709?

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

What time zone is 57709 in?

57709 uses America/Denver.

What ZIP codes are near 57709?

The closest are 57702 (5.8 mi), 57701 (6.6 mi), 57718 (7 mi), 57769 (11.8 mi) and 57706 (12.1 mi).

Is 57709 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “57709 ZIP Code — Rapid City, South Dakota (Pennington County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57709

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