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Where 51528 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 51528 into a pocket calculator and turn it upside down: BZSIS — not quite a word, sorry.
- ➕ As a number, 51,528 = 2 × 2 × 2 × 3 × 19 × 113. Its digits add up to 21, a total 2,594 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100101001000 - 🏠 Its numerical neighbours: 51527 (Defiance, IA, 10 mi away) and 51529 (Dunlap, IA, 8 mi away).
- 🔄 Backwards, 51528 becomes 82515 — and that is a real ZIP code: Hudson, WY, 669 miles away.
- 👥 20 other ZIP codes are made of exactly the same digits (12585, 12855, 15258, 15825, 18255, 25185, …). The farthest-flung twin is 12585 in Verbank, NY, 1,120 miles away.
- 🧭 Farther north than 75% of all ZIP codes, and farther west than 70%.
- 🎯216 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51528 and you would come out at 41.91°S, 84.50°E — 858 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 14m of daylight. Shortest: 9h 07m.
- 📏 At 71.1 square miles of land, 51528 is bigger than 69% of ZIP codes — room for about 54 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 674This ZIP674 |
|---|---|
| Households | 285This ZIP285 |
| Housing units | 291This ZIP291 |
| Median age | 36.6This ZIP36.6Iowa38.6US 38.9 |
| Median household income | $63,173This ZIP$63,173Iowa$75,059US $80,734 |
| Median home value | $117,900This ZIP$117,900Iowa$208,000US $332,700 |
| Median gross rent | $742This ZIP$742Iowa$972US $1,413 |
| Bachelor's degree or higher | 13.1%This ZIP13.1% |
| Mean commute | 20.1 minThis ZIP20.1 min |
| Population density | 9.5 / sq miThis ZIP9.5 / sq mi |
Business and tax activity
| Business establishments | 18This ZIP18 |
|---|---|
| Employees | 88This ZIP88 |
| Annual payroll | $2,168,000This ZIP$2,168,000 |
| Tax returns filed | 390This ZIP390 |
| Total adjusted gross income | $27,234,000This ZIP$27,234,000 |
Land area
| Land area | 71.12 sq miThis ZIP71.12 sq mi |
|---|---|
| Water area | 0.20 sq miThis ZIP0.20 sq mi |
Other place names in 51528
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51528
| ZIP | City | Distance |
|---|---|---|
51520 | Arion, IA | 4.7 mi |
51529 | Dunlap, IA | 8.0 mi |
51530 | Earling, IA | 9.1 mi |
51527 | Defiance, IA | 9.7 mi |
51442 | Denison, IA | 11.3 mi |
51562 | Panama, IA | 12.7 mi |
51439 | Charter Oak, IA | 12.8 mi |
51060 | Ute, IA | 13.2 mi |
51578 | Westphalia, IA | 14.1 mi |
51579 | Woodbine, IA | 15.1 mi |
Find every ZIP code within 10 miles of 51528 →
Questions about this ZIP code
Where is ZIP code 51528?
51528 is in Dow City, Iowa, in Crawford County. Its published point location is 41.9089, -95.5012.
What county is 51528 in?
51528 lies in Crawford County.
What area code is 51528?
Dow City uses area code 712, from NANPA's telephone records.
What time zone is 51528 in?
51528 uses America/Chicago.
How many people live in 51528?
About 674 people live in ZIP code 51528, in 285 households, at 9.5 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 51528?
$63,173 a year, against $75,059 across Iowa.
What ZIP codes are near 51528?
The closest are 51520 (4.7 mi), 51529 (8 mi), 51530 (9.1 mi), 51527 (9.7 mi) and 51442 (11.3 mi).
Is 51528 a PO Box ZIP code?
51528 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51528 ZIP Code — Dow City, Iowa (Crawford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51528
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51528.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.