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Where 50231 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 50231 into a pocket calculator and turn it upside down: IEZOS — not quite a word, sorry.
- ➕ 50231 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 11, a total 714 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100010000110111 - 🏠 Its numerical neighbours: 50230 (Radcliffe, IA, 9 mi away) and 50232 (Reasnor, IA, 57 mi away).
- 🔄 Backwards, 50231 becomes 13205 — and that is a real ZIP code: Syracuse, NY, 888 miles away.
- 👥 73 other ZIP codes are made of exactly the same digits (01235, 01253, 01523, 01532, 02135, 02153, …). The farthest-flung twin is 02351 in Abington, MA, 1,156 miles away.
- 🧭 Farther north than 77% of all ZIP codes, and farther west than 65%.
- 🎯308 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 50231 and you would come out at 42.24°S, 86.40°E — 918 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 05m.
- 📏 At 0.454 square miles of land, 50231 is bigger than 5% of ZIP codes — about 220 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 142This ZIP142 |
|---|---|
| Households | 61This ZIP61 |
| Housing units | 65This ZIP65 |
| Median age | 51.5This ZIP51.5Iowa38.6US 38.9 |
| Median household income | $72,321This ZIP$72,321Iowa$75,059US $80,734 |
| Median home value | $110,800This ZIP$110,800Iowa$208,000US $332,700 |
| Bachelor's degree or higher | 15.2%This ZIP15.2% |
| Mean commute | 28.5 minThis ZIP28.5 min |
| Population density | 312.8 / sq miThis ZIP312.8 / sq mi |
Business and tax activity
| Business establishments | 5This ZIP5 |
|---|---|
| Employees | 15This ZIP15 |
| Annual payroll | $960,000This ZIP$960,000 |
Land area
| Land area | 0.45 sq miThis ZIP0.45 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 50231
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 50231
| ZIP | City | Distance |
|---|---|---|
50248 | Story City, IA | 3.3 mi |
50130 | Jewell, IA | 5.7 mi |
50075 | Ellsworth, IA | 6.3 mi |
50236 | Roland, IA | 7.1 mi |
50105 | Gilbert, IA | 8.5 mi |
50230 | Radcliffe, IA | 8.9 mi |
50246 | Stanhope, IA | 9.8 mi |
50102 | Garden City, IA | 10.4 mi |
50132 | Kamrar, IA | 11.5 mi |
50154 | Mc Callsburg, IA | 11.6 mi |
Find every ZIP code within 10 miles of 50231 →
Questions about this ZIP code
Where is ZIP code 50231?
50231 is in Randall, Iowa, in Hamilton County. Its published point location is 42.2377, -93.6026.
What county is 50231 in?
50231 lies in Hamilton County.
What area code is 50231?
Randall uses area code 515, from NANPA's telephone records.
What time zone is 50231 in?
50231 uses America/Chicago.
How many people live in 50231?
About 142 people live in ZIP code 50231, in 61 households, at 312.8 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 50231?
$72,321 a year, against $75,059 across Iowa.
What ZIP codes are near 50231?
The closest are 50248 (3.3 mi), 50130 (5.7 mi), 50075 (6.3 mi), 50236 (7.1 mi) and 50105 (8.5 mi).
Is 50231 a PO Box ZIP code?
50231 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “50231 ZIP Code — Randall, Iowa (Hamilton County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50231
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/50231.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.