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Where 50431 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 50431 into a pocket calculator and turn it upside down: IEhOS — not quite a word, sorry.
- ➕ As a number, 50,431 = 29 × 37 × 47. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100010011111111 - 🏠 Its numerical neighbours: 50430 (Corwith, IA, 34 mi away) and 50432 (Crystal Lake, IA, 40 mi away).
- 🔄 Backwards, 50431 becomes 13405, which is not a ZIP code at all.
- 👥 64 other ZIP codes are made of exactly the same digits (01354, 01453, 01534, 01543, 03451, 04351, …). The farthest-flung twin is 34051 in FPO AA, a military post office, 2,344 miles away.
- 🧭 Farther north than 81% of all ZIP codes, and farther west than 64%.
- 🎯337 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 50431 and you would come out at 42.74°S, 86.63°E — 907 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 20m of daylight. Shortest: 9h 02m.
- 📏 At 0.747 square miles of land, 50431 is bigger than 7% of ZIP codes — about 362 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 228This ZIP228 |
|---|---|
| Households | 84This ZIP84 |
| Housing units | 109This ZIP109 |
| Median age | 34.2This ZIP34.2Iowa38.6US 38.9 |
| Median household income | $62,917This ZIP$62,917Iowa$75,059US $80,734 |
| Median home value | $90,000This ZIP$90,000Iowa$208,000US $332,700 |
| Median gross rent | $693This ZIP$693Iowa$972US $1,413 |
| Bachelor's degree or higher | 10.6%This ZIP10.6% |
| Mean commute | 22.5 minThis ZIP22.5 min |
| Population density | 305.2 / sq miThis ZIP305.2 / sq mi |
Business and tax activity
| Business establishments | 3This ZIP3 |
|---|---|
| Employees | 4This ZIP4 |
| Annual payroll | $125,000This ZIP$125,000 |
Land area
| Land area | 0.75 sq miThis ZIP0.75 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 50431
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 50431
| ZIP | City | Distance |
|---|---|---|
50452 | Latimer, IA | 3.1 mi |
50420 | Alexander, IA | 6.5 mi |
50441 | Hampton, IA | 7.6 mi |
50071 | Dows, IA | 9.2 mi |
50470 | Rowan, IA | 9.4 mi |
50041 | Bradford, IA | 9.4 mi |
50427 | Chapin, IA | 10.2 mi |
50227 | Popejoy, IA | 10.3 mi |
50475 | Sheffield, IA | 12.8 mi |
50633 | Geneva, IA | 13.1 mi |
Find every ZIP code within 10 miles of 50431 →
Questions about this ZIP code
Where is ZIP code 50431?
50431 is in Coulter, Iowa, in Franklin County. Its published point location is 42.7365, -93.3699.
What county is 50431 in?
50431 lies in Franklin County.
What area code is 50431?
Coulter uses area code 641, from NANPA's telephone records.
What time zone is 50431 in?
50431 uses America/Chicago.
How many people live in 50431?
About 228 people live in ZIP code 50431, in 84 households, at 305.2 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 50431?
$62,917 a year, against $75,059 across Iowa.
What ZIP codes are near 50431?
The closest are 50452 (3.1 mi), 50420 (6.5 mi), 50441 (7.6 mi), 50071 (9.2 mi) and 50470 (9.4 mi).
Is 50431 a PO Box ZIP code?
50431 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “50431 ZIP Code — Coulter, Iowa (Franklin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50431
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/50431.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.