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Where 59521 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 59521 into a pocket calculator and turn it upside down: IZSGS — not quite a word, sorry.
- ➕ As a number, 59,521 = 7 × 11 × 773. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110100010000001 - 🏠 Its numerical neighbours: 59520 (Big Sandy, MT, 18 mi away) and 59522 (Chester, MT, 50 mi away).
- 🔄 Backwards, 59521 becomes 12595, which is not a ZIP code at all.
- 👥 26 other ZIP codes are made of exactly the same digits (12955, 15259, 15295, 15925, 15952, 19255, …). The farthest-flung twin is 29551 in Hartsville, SC, 1,805 miles away.
- 🧭 Farther north than 98% of all ZIP codes, and farther west than 85%.
- 🎯812 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 59521 and you would come out at 48.31°S, 70.05°E — 73 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 16h 06m of daylight. Shortest: 8h 19m.
- 📏 At 283.6 square miles of land, 59521 is bigger than 94% of ZIP codes — room for about 215 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 3,529This ZIP3,529 |
|---|---|
| Households | 1,001This ZIP1,001 |
| Housing units | 1,123This ZIP1,123 |
| Median age | 30.2This ZIP30.2Montana40.4US 38.9 |
| Median household income | $50,288This ZIP$50,288Montana$72,509US $80,734 |
| Median home value | $103,700This ZIP$103,700Montana$375,800US $332,700 |
| Median gross rent | $406This ZIP$406Montana$1,081US $1,413 |
| Bachelor's degree or higher | 18.7%This ZIP18.7% |
| Mean commute | 15.4 minThis ZIP15.4 min |
| Population density | 12.4 / sq miThis ZIP12.4 / sq mi |
Business and tax activity
| Business establishments | 20This ZIP20 |
|---|---|
| Employees | 513This ZIP513 |
| Annual payroll | $31,898,000This ZIP$31,898,000 |
| Tax returns filed | 950This ZIP950 |
| Total adjusted gross income | $50,583,000This ZIP$50,583,000 |
Land area
| Land area | 283.63 sq miThis ZIP283.63 sq mi |
|---|---|
| Water area | 0.31 sq miThis ZIP0.31 sq mi |
Counties 59521 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Hill County | 81.6% |
| Chouteau County | 18.4% |
Other place names in 59521
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 59521
| ZIP | City | Distance |
|---|---|---|
59520 | Big Sandy, MT | 18.5 mi |
59532 | Kremlin, MT | 20.8 mi |
59525 | Gildford, MT | 27.3 mi |
59501 | Havre, MT | 27.7 mi |
59460 | Loma, MT | 30.2 mi |
59528 | Hingham, MT | 30.9 mi |
59540 | Rudyard, MT | 34.9 mi |
59523 | Chinook, MT | 37.7 mi |
59530 | Inverness, MT | 39.8 mi |
59535 | Lloyd, MT | 40.9 mi |
Find every ZIP code within 10 miles of 59521 →
Questions about this ZIP code
Where is ZIP code 59521?
59521 is in Box Elder, Montana, in Hill County. Its published point location is 48.3050, -109.9513.
What county is 59521 in?
59521 spans 2 counties: Hill County and Chouteau County. Most of it falls in Hill 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 59521?
Box Elder uses area code 406, from NANPA's telephone records.
What time zone is 59521 in?
59521 uses America/Denver.
How many people live in 59521?
About 3,529 people live in ZIP code 59521, in 1,001 households, at 12.4 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 59521?
$50,288 a year, against $72,509 across Montana.
What ZIP codes are near 59521?
The closest are 59520 (18.5 mi), 59532 (20.8 mi), 59525 (27.3 mi), 59501 (27.7 mi) and 59460 (30.2 mi).
Is 59521 a PO Box ZIP code?
59521 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “59521 ZIP Code — Box Elder, Montana (Hill County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/59521
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/59521.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.