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Where 51527 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 51527 into a pocket calculator and turn it upside down: LZSIS — not quite a word, sorry.
- ➕ As a number, 51,527 = 7 × 17 × 433. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100101000111 - 🏠 Its numerical neighbours: 51526 (Crescent, IA, 42 mi away) and 51528 (Dow City, IA, 10 mi away).
- 🔄 Backwards, 51527 becomes 72515 — and that is a real ZIP code: Bexar, AR, 423 miles away.
- 👥 31 other ZIP codes are made of exactly the same digits (12575, 15257, 15275, 15725, 15752, 17255, …). The farthest-flung twin is 12575 in Rock Tavern, NY, 1,091 miles away.
- 🧭 Farther north than 74% of all ZIP codes, and farther west than 69%.
- 🎯219 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51527 and you would come out at 41.84°S, 84.66°E — 868 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 13m of daylight. Shortest: 9h 08m.
- 📏 At 42.3 square miles of land, 51527 is bigger than 55% of ZIP codes — room for about 32 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 362This ZIP362 |
|---|---|
| Households | 166This ZIP166 |
| Housing units | 170This ZIP170 |
| Median age | 37.4This ZIP37.4Iowa38.6US 38.9 |
| Median household income | $64,750This ZIP$64,750Iowa$75,059US $80,734 |
| Median home value | $123,400This ZIP$123,400Iowa$208,000US $332,700 |
| Median gross rent | $689This ZIP$689Iowa$972US $1,413 |
| Bachelor's degree or higher | 22.5%This ZIP22.5% |
| Mean commute | 17.1 minThis ZIP17.1 min |
| Population density | 8.6 / sq miThis ZIP8.6 / sq mi |
Business and tax activity
| Business establishments | 18This ZIP18 |
|---|---|
| Employees | 143This ZIP143 |
| Annual payroll | $7,031,000This ZIP$7,031,000 |
| Tax returns filed | 260This ZIP260 |
| Total adjusted gross income | $19,178,000This ZIP$19,178,000 |
Land area
| Land area | 42.26 sq miThis ZIP42.26 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
Counties 51527 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Shelby County | 83.3% |
| Crawford County | 16.7% |
Other place names in 51527
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51527
| ZIP | City | Distance |
|---|---|---|
51530 | Earling, IA | 6.0 mi |
51454 | Manilla, IA | 8.1 mi |
51446 | Irwin, IA | 8.6 mi |
51578 | Westphalia, IA | 8.8 mi |
51528 | Dow City, IA | 9.7 mi |
51520 | Arion, IA | 10.9 mi |
51447 | Kirkman, IA | 11.1 mi |
51432 | Aspinwall, IA | 11.3 mi |
51562 | Panama, IA | 11.3 mi |
51537 | Harlan, IA | 13.3 mi |
Find every ZIP code within 10 miles of 51527 →
Questions about this ZIP code
Where is ZIP code 51527?
51527 is in Defiance, Iowa, in Shelby County. Its published point location is 41.8398, -95.3365.
What county is 51527 in?
51527 spans 2 counties: Shelby County and Crawford County. Most of it falls in Shelby 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 51527?
Defiance uses area code 712, from NANPA's telephone records.
What time zone is 51527 in?
51527 uses America/Chicago.
How many people live in 51527?
About 362 people live in ZIP code 51527, in 166 households, at 8.6 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 51527?
$64,750 a year, against $75,059 across Iowa.
What ZIP codes are near 51527?
The closest are 51530 (6 mi), 51454 (8.1 mi), 51446 (8.6 mi), 51578 (8.8 mi) and 51528 (9.7 mi).
Is 51527 a PO Box ZIP code?
51527 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51527 ZIP Code — Defiance, Iowa (Shelby County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51527
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51527.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.