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Where 50831 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 50831 into a pocket calculator and turn it upside down: IEBOS — not quite a word, sorry.
- ➕ As a number, 50,831 = 11 × 4621. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100011010001111 - 🏠 Its numerical neighbours: 50830 (Afton, IA, 5 mi away) and 50833 (Bedford, IA, 32 mi away).
- 🔄 Backwards, 50831 becomes 13805, which is not a ZIP code at all.
- 👥 55 other ZIP codes are made of exactly the same digits (01538, 01583, 01835, 01853, 03581, 03815, …). The farthest-flung twin is 03851 in Milton, NH, 1,196 miles away.
- 🧭 Farther north than 66% of all ZIP codes, and farther west than 66%.
- 🎯242 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 50831 and you would come out at 40.95°S, 85.78°E — 952 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 14m.
- 📏 At 0.224 square miles of land, 50831 is bigger than 3% of ZIP codes — about 108 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 22This ZIP22 |
|---|---|
| Households | 9This ZIP9 |
| Housing units | 9This ZIP9 |
| Median age | 63.5This ZIP63.5Iowa38.6US 38.9 |
| Median household income | $95,625This ZIP$95,625Iowa$75,059US $80,734 |
| Bachelor's degree or higher | 27.8%This ZIP27.8% |
| Population density | 98.2 / sq miThis ZIP98.2 / sq mi |
Land area
| Land area | 0.22 sq miThis ZIP0.22 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 50831
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 50831
| ZIP | City | Distance |
|---|---|---|
50861 | Shannon City, IA | 3.4 mi |
50830 | Afton, IA | 5.2 mi |
50863 | Tingley, IA | 7.5 mi |
50254 | Thayer, IA | 8.9 mi |
50074 | Ellston, IA | 9.5 mi |
50845 | Diagonal, IA | 11.6 mi |
50801 | Creston, IA | 12.9 mi |
50174 | Murray, IA | 13.8 mi |
50842 | Cromwell, IA | 13.9 mi |
50149 | Lorimor, IA | 15.2 mi |
Find every ZIP code within 10 miles of 50831 →
Questions about this ZIP code
Where is ZIP code 50831?
50831 is in Arispe, Iowa, in Union County. Its published point location is 40.9508, -94.2224.
What county is 50831 in?
50831 lies in Union County.
What area code is 50831?
Arispe uses area code 641, from NANPA's telephone records.
What time zone is 50831 in?
50831 uses America/Chicago.
How many people live in 50831?
About 22 people live in ZIP code 50831, in 9 households, at 98.2 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 50831?
$95,625 a year, against $75,059 across Iowa.
What ZIP codes are near 50831?
The closest are 50861 (3.4 mi), 50830 (5.2 mi), 50863 (7.5 mi), 50254 (8.9 mi) and 50074 (9.5 mi).
Is 50831 a PO Box ZIP code?
50831 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “50831 ZIP Code — Arispe, Iowa (Union County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50831
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/50831.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.