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Where 52557 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 52557 into a pocket calculator and turn it upside down: LSSZS — not quite a word, sorry.
- ➕ As a number, 52,557 = 3 × 17519. Its digits add up to 24, a total 2,425 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100110101001101 - 🏠 Its numerical neighbours: 52556 (Fairfield, IA, 2 mi away) and 52560 (Floris, IA, 19 mi away).
- 🔄 Backwards, 52557 becomes 75525, which is not a ZIP code at all.
- 👥 10 other ZIP codes are made of exactly the same digits (25557, 25755, 27555, 52755, 55572, 55725, …). The farthest-flung twin is 27555 in Micro, NC, 835 miles away.
- 🧭 Farther north than 67% of all ZIP codes, and farther west than 61%.
- 🎯357 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 52557 and you would come out at 41.02°S, 88.03°E — 1,037 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 08m of daylight. Shortest: 9h 13m.
- 📏 At 0.267 square miles of land, 52557 is bigger than 3% of ZIP codes — about 129 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 685This ZIP685 |
|---|---|
| Households | 0 |
| Housing units | 0 |
| Median age | 25.1This ZIP25.1Iowa38.6US 38.9 |
| Bachelor's degree or higher | 83.6%This ZIP83.6% |
| Mean commute | 12.2 minThis ZIP12.2 min |
| Population density | 2,565.5 / sq miThis ZIP2,565.5 / sq mi |
Business and tax activity
| Business establishments | 7This ZIP7 |
|---|---|
| Employees | 1,102This ZIP1,102 |
| Annual payroll | $49,620,000This ZIP$49,620,000 |
Land area
| Land area | 0.27 sq miThis ZIP0.27 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 52557
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 52557
| ZIP | City | Distance |
|---|---|---|
52556 | Fairfield, IA | 2.0 mi |
52567 | Libertyville, IA | 8.2 mi |
52580 | Packwood, IA | 8.7 mi |
52533 | Batavia, IA | 9.4 mi |
52535 | Birmingham, IA | 10.9 mi |
52635 | Lockridge, IA | 10.9 mi |
52585 | Richland, IA | 11.7 mi |
52540 | Brighton, IA | 12.0 mi |
52651 | Stockport, IA | 13.4 mi |
52642 | Rome, IA | 14.6 mi |
Find every ZIP code within 10 miles of 52557 →
Questions about this ZIP code
Where is ZIP code 52557?
52557 is in Fairfield, Iowa, in Jefferson County. Its published point location is 41.0201, -91.9664.
What county is 52557 in?
52557 lies in Jefferson County.
What area code is 52557?
Fairfield uses area code 641, from NANPA's telephone records.
What time zone is 52557 in?
52557 uses America/Chicago.
How many people live in 52557?
About 685 people live in ZIP code 52557, at 2,565.5 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 52557?
The closest are 52556 (2 mi), 52567 (8.2 mi), 52580 (8.7 mi), 52533 (9.4 mi) and 52535 (10.9 mi).
Is 52557 a PO Box ZIP code?
52557 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “52557 ZIP Code — Fairfield, Iowa (Jefferson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/52557
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/52557.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.