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Where 73521 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 73521 into a pocket calculator and turn it upside down: IZSEL — not quite a word, sorry.
- ➕ As a number, 73,521 = 3 × 3 × 3 × 7 × 389. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10001111100110001 - 🏠 Its numerical neighbours: 73520 (Addington, OK, 80 mi away) and 73522 (Altus, OK, 1 mi away).
- 🔄 Backwards, 73521 becomes 12537 — and that is a real ZIP code: Hughsonville, NY, 1,454 miles away.
- 👥 56 other ZIP codes are made of exactly the same digits (12537, 13752, 15237, 15327, 15723, 15732, …). The farthest-flung twin is 12537 in Hughsonville, NY, 1,454 miles away.
- 🧭 Farther south than 76% of all ZIP codes, and farther west than 79%.
- 🎯361 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 73521 and you would come out at 34.63°S, 80.68°E — 1,147 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 29m of daylight. Shortest: 9h 50m.
- 📏 At 185.8 square miles of land, 73521 is bigger than 90% of ZIP codes — room for about 141 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 20,155This ZIP20,155 |
|---|---|
| Households | 8,098This ZIP8,098 |
| Housing units | 9,963This ZIP9,963 |
| Median age | 34.8This ZIP34.8Oklahoma37.0US 38.9 |
| Median household income | $60,887This ZIP$60,887Oklahoma$65,039US $80,734 |
| Median home value | $160,600This ZIP$160,600Oklahoma$199,800US $332,700 |
| Median gross rent | $861This ZIP$861Oklahoma$1,014US $1,413 |
| Bachelor's degree or higher | 24.9%This ZIP24.9% |
| Mean commute | 11.7 minThis ZIP11.7 min |
| Population density | 108.5 / sq miThis ZIP108.5 / sq mi |
Business and tax activity
| Business establishments | 435This ZIP435 |
|---|---|
| Employees | 5,454This ZIP5,454 |
| Annual payroll | $222,742,000This ZIP$222,742,000 |
| Tax returns filed | 8,020This ZIP8,020 |
| Total adjusted gross income | $481,926,000This ZIP$481,926,000 |
Land area
| Land area | 185.76 sq miThis ZIP185.76 sq mi |
|---|---|
| Water area | 0.26 sq miThis ZIP0.26 sq mi |
Other place names in 73521
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 73521
| ZIP | City | Distance |
|---|---|---|
73522 | Altus, OK | 1.1 mi |
73523 | Altus Afb, OK | 2.2 mi |
73556 | Martha, OK | 7.5 mi |
73549 | Headrick, OK | 9.3 mi |
73560 | Olustee, OK | 9.7 mi |
73526 | Blair, OK | 11.3 mi |
73539 | Elmer, OK | 12.4 mi |
73570 | Tipton, OK | 14.1 mi |
73532 | Duke, OK | 15.6 mi |
79247 | Odell, TX | 16.8 mi |
Find every ZIP code within 10 miles of 73521 →
Questions about this ZIP code
Where is ZIP code 73521?
73521 is in Altus, Oklahoma, in Jackson County, part of the Altus, OK micropolitan area. Its published point location is 34.6345, -99.3153.
What county is 73521 in?
73521 lies in Jackson County.
What area code is 73521?
Altus uses area code 580, from NANPA's telephone records.
What time zone is 73521 in?
73521 uses America/Chicago.
How many people live in 73521?
About 20,155 people live in ZIP code 73521, in 8,098 households, at 108.5 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 73521?
$60,887 a year, against $65,039 across Oklahoma.
What ZIP codes are near 73521?
The closest are 73522 (1.1 mi), 73523 (2.2 mi), 73556 (7.5 mi), 73549 (9.3 mi) and 73560 (9.7 mi).
Is 73521 a PO Box ZIP code?
73521 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “73521 ZIP Code — Altus, Oklahoma (Jackson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/73521
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/73521.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.