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Where 83251 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.
- 🔢 Type 83251 into a pocket calculator and turn it upside down: ISZEB — not quite a word, sorry.
- ➕ As a number, 83,251 = 7 × 7 × 1699. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10100010100110011 - 🏠 Its numerical neighbours: 83250 (McCammon, ID, 123 mi away) and 83252 (Malad City, ID, 145 mi away).
- 🔄 Backwards, 83251 becomes 15238 — and that is a real ZIP code: Pittsburgh, PA, 1,746 miles away.
- 👥 57 other ZIP codes are made of exactly the same digits (12538, 12583, 12835, 12853, 13825, 15238, …). The farthest-flung twin is 32815 in Orlando, FL, 2,127 miles away.
- 🧭 Farther north than 87% of all ZIP codes, and farther west than 88%.
- 🎯838 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 83251 and you would come out at 43.94°S, 66.06°E — 422 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 29m of daylight. Shortest: 8h 53m.
- 📏 At 1,124.2 square miles of land, 83251 is bigger than 99% of ZIP codes — room for about 853 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,443This ZIP1,443 |
|---|---|
| Households | 603This ZIP603 |
| Housing units | 942This ZIP942 |
| Median age | 60.6This ZIP60.6Idaho37.3US 38.9 |
| Median household income | $73,482This ZIP$73,482Idaho$77,800US $80,734 |
| Median home value | $366,900This ZIP$366,900Idaho$418,600US $332,700 |
| Bachelor's degree or higher | 31.8%This ZIP31.8% |
| Mean commute | 20.7 minThis ZIP20.7 min |
| Population density | 1.3 / sq miThis ZIP1.3 / sq mi |
Business and tax activity
| Business establishments | 41This ZIP41 |
|---|---|
| Employees | 215This ZIP215 |
| Annual payroll | $7,289,000This ZIP$7,289,000 |
| Tax returns filed | 560This ZIP560 |
| Total adjusted gross income | $37,860,000This ZIP$37,860,000 |
Land area
| Land area | 1,124.15 sq miThis ZIP1,124.15 sq mi |
|---|---|
| Water area | 2.97 sq miThis ZIP2.97 sq mi |
Other place names in 83251
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 83251
| ZIP | City | Distance |
|---|---|---|
83353 | Sun Valley, ID | 25.8 mi |
83354 | Sun Valley, ID | 26.7 mi |
83255 | Moore, ID | 29.1 mi |
83333 | Hailey, ID | 29.7 mi |
83226 | Challis, ID | 29.7 mi |
83227 | Clayton, ID | 31.1 mi |
83340 | Ketchum, ID | 34.9 mi |
83320 | Carey, ID | 37.4 mi |
83253 | May, ID | 41.9 mi |
83313 | Bellevue, ID | 43.1 mi |
Find every ZIP code within 10 miles of 83251 →
Questions about this ZIP code
Where is ZIP code 83251?
83251 is in Mackay, Idaho, in Custer County. Its published point location is 43.9447, -113.9447.
What county is 83251 in?
83251 lies in Custer County.
What area code is 83251?
Mackay uses area codes 208 and 986, from NANPA's telephone records.
What time zone is 83251 in?
83251 uses America/Boise.
How many people live in 83251?
About 1,443 people live in ZIP code 83251, in 603 households, at 1.3 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 83251?
$73,482 a year, against $77,800 across Idaho.
What ZIP codes are near 83251?
The closest are 83353 (25.8 mi), 83354 (26.7 mi), 83255 (29.1 mi), 83333 (29.7 mi) and 83226 (29.7 mi).
Is 83251 a PO Box ZIP code?
83251 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “83251 ZIP Code — Mackay, Idaho (Custer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83251
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/83251.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.