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zipcodes.pro — ZIP/58640

58640

ZIP 58640 is Killdeer, North Dakota, mostly in Dunn County; area code 701; Mountain time.

Type
Standard
Time zone
America/Denver
County
Dunn +2 more
Metro area
Dickinson, ND
Population
1,369
Coordinates
47.4537, -102.9054
☼ Live from 58640 — Killdeer, ND

Weather right now

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Local time: —

Where 58640 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 58640
  • 🔢 Type 58640 into a pocket calculator and turn it upside down: OhgBS — not quite a word, sorry.
  • ➕ As a number, 58,640 = 2 × 2 × 2 × 2 × 5 × 733. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110010100010000
  • 🏠 Its numerical neighbours: 58639 (Hettinger, ND, 97 mi away) and 58641 (Lefor, ND, 58 mi away).
  • 🔄 Backwards, 58640 becomes 04685 — and that is a real ZIP code: Swans Island, ME, 1,662 miles away.
  • 👥 66 other ZIP codes are made of exactly the same digits (04568, 04658, 04685, 04856, 04865, 05468, …). The farthest-flung twin is 04658 in Milbridge, ME, 1,680 miles away.
  • 🧭 Farther north than 96% of all ZIP codes, and farther west than 81%.
  • 🎯569 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 58640 and you would come out at 47.45°S, 77.09°E — 341 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 58m of daylight. Shortest: 8h 27m.
  • 📏 At 437.4 square miles of land, 58640 is bigger than 97% of ZIP codes — room for about 332 Central Parks.
🌙 The sky over 58640 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,369This ZIP1,369
Households490This ZIP490
Housing units665This ZIP665
Median age38.6This ZIP38.6North Dakota35.9US 38.9
Median household income$100,688This ZIP$100,688North Dakota$76,657US $80,734
Median home value$343,700This ZIP$343,700North Dakota$249,900US $332,700
Median gross rent$869This ZIP$869North Dakota$954US $1,413
Bachelor's degree or higher29.9%This ZIP29.9%
Mean commute24.6 minThis ZIP24.6 min
Population density3.1 / sq miThis ZIP3.1 / sq mi

Business and tax activity

Business establishments127This ZIP127
Employees1,504This ZIP1,504
Annual payroll$133,020,000This ZIP$133,020,000
Tax returns filed860This ZIP860
Total adjusted gross income$175,212,000This ZIP$175,212,000

Land area

Land area437.43 sq miThis ZIP437.43 sq mi
Water area1.15 sq miThis ZIP1.15 sq mi

Counties 58640 spans

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

CountyShare of this ZIP
Dunn County 98.0%
Billings County 1.2%
McKenzie County 0.9%

Other place names in 58640

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

ZIP codes near 58640

ZIPCityDistance
58626 Dunn Center, ND 15.1 mi
58642 Manning, ND 17.8 mi
58634 Grassy Butte, ND 21.4 mi
58757 Mandaree, ND 22.9 mi
58627 Fairfield, ND 22.9 mi
58636 Halliday, ND 26.5 mi
58854 Watford City, ND 28.3 mi
58847 Keene, ND 30.1 mi
58835 Arnegard, ND 32.0 mi
58644 Marshall, ND 34.3 mi

Find every ZIP code within 10 miles of 58640 →

Questions about this ZIP code

Where is ZIP code 58640?

58640 is in Killdeer, North Dakota, in Dunn County, part of the Dickinson, ND micropolitan area. Its published point location is 47.4537, -102.9054.

What county is 58640 in?

58640 spans 3 counties: Dunn County, Billings County and McKenzie County. Most of it falls in Dunn 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 58640?

Killdeer uses area code 701, from NANPA's telephone records.

What time zone is 58640 in?

58640 uses America/Denver.

How many people live in 58640?

About 1,369 people live in ZIP code 58640, in 490 households, at 3.1 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 58640?

$100,688 a year, against $76,657 across North Dakota.

What ZIP codes are near 58640?

The closest are 58626 (15.1 mi), 58642 (17.8 mi), 58634 (21.4 mi), 58757 (22.9 mi) and 58627 (22.9 mi).

Is 58640 a PO Box ZIP code?

58640 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “58640 ZIP Code — Killdeer, North Dakota (Dunn County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/58640

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/58640.json

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