Weather right now
Asking the National Weather Service…
Where 51431 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 51431 into a pocket calculator and turn it upside down: IEhIS — not quite a word, sorry.
- ➕ 51431 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 14, a total 1,416 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100011100111 - 🏠 Its numerical neighbours: 51430 (Arcadia, IA, 24 mi away) and 51432 (Aspinwall, IA, 32 mi away).
- 🔄 Backwards, 51431 becomes 13415 — and that is a real ZIP code: New Lisbon, NY, 1,025 miles away.
- 👥 32 other ZIP codes are made of exactly the same digits (11354, 11435, 13145, 13154, 13415, 14135, …). The farthest-flung twin is 11435 in Jamaica, NY, 1,117 miles away.
- 🧭 Farther north than 78% of all ZIP codes, and farther west than 69%.
- 🎯242 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51431 and you would come out at 42.34°S, 84.65°E — 844 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 04m.
- 📏 At 37.9 square miles of land, 51431 is bigger than 52% of ZIP codes — room for about 29 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 430This ZIP430 |
|---|---|
| Households | 187This ZIP187 |
| Housing units | 197This ZIP197 |
| Median age | 38.2This ZIP38.2Iowa38.6US 38.9 |
| Median household income | $54,258This ZIP$54,258Iowa$75,059US $80,734 |
| Median home value | $80,000This ZIP$80,000Iowa$208,000US $332,700 |
| Median gross rent | $676This ZIP$676Iowa$972US $1,413 |
| Bachelor's degree or higher | 20.0%This ZIP20.0% |
| Mean commute | 21.6 minThis ZIP21.6 min |
| Population density | 11.4 / sq miThis ZIP11.4 / sq mi |
Business and tax activity
| Business establishments | 11This ZIP11 |
|---|---|
| Employees | 79This ZIP79 |
| Annual payroll | $4,875,000This ZIP$4,875,000 |
| Tax returns filed | 180This ZIP180 |
| Total adjusted gross income | $12,339,000This ZIP$12,339,000 |
Land area
| Land area | 37.86 sq miThis ZIP37.86 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Counties 51431 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Ida County | 89.0% |
| Sac County | 11.0% |
Other place names in 51431
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51431
| ZIP | City | Distance |
|---|---|---|
51445 | Ida Grove, IA | 6.0 mi |
51458 | Odebolt, IA | 6.1 mi |
51448 | Kiron, IA | 9.8 mi |
51053 | Schaller, IA | 10.9 mi |
50535 | Early, IA | 12.1 mi |
51020 | Galva, IA | 12.2 mi |
51461 | Schleswig, IA | 13.3 mi |
51006 | Battle Creek, IA | 13.5 mi |
51466 | Wall Lake, IA | 14.5 mi |
51025 | Holstein, IA | 14.9 mi |
Find every ZIP code within 10 miles of 51431 →
Questions about this ZIP code
Where is ZIP code 51431?
51431 is in Arthur, Iowa, in Ida County. Its published point location is 42.3444, -95.3515.
What county is 51431 in?
51431 spans 2 counties: Ida County and Sac County. Most of it falls in Ida 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 51431?
Arthur uses area code 712, from NANPA's telephone records.
What time zone is 51431 in?
51431 uses America/Chicago.
How many people live in 51431?
About 430 people live in ZIP code 51431, in 187 households, at 11.4 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 51431?
$54,258 a year, against $75,059 across Iowa.
What ZIP codes are near 51431?
The closest are 51445 (6 mi), 51458 (6.1 mi), 51448 (9.8 mi), 51053 (10.9 mi) and 50535 (12.1 mi).
Is 51431 a PO Box ZIP code?
51431 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51431 ZIP Code — Arthur, Iowa (Ida County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51431
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51431.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.