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Where 52309 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 52309 into a pocket calculator and turn it upside down: GOEZS — not quite a word, sorry.
- ➕ As a number, 52,309 = 17 × 17 × 181. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100110001010101 - 🏠 Its numerical neighbours: 52308 (Millersburg, IA, 76 mi away) and 52310 (Monticello, IA, 17 mi away).
- 🔄 Backwards, 52309 becomes 90325, which is not a ZIP code at all.
- 👥 57 other ZIP codes are made of exactly the same digits (02359, 02539, 03259, 03592, 09235, 09352, …). The farthest-flung twin is 09352 in APO AE, a military post office, 4,535 miles away.
- 🧭 Farther north than 76% of all ZIP codes, and farther west than 59%.
- 🎯431 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 52309 and you would come out at 42.13°S, 89.11°E — 1,034 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 15m of daylight. Shortest: 9h 06m.
- 📏 At 34.3 square miles of land, 52309 is bigger than 49% of ZIP codes — room for about 26 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 443This ZIP443 |
|---|---|
| Households | 190This ZIP190 |
| Housing units | 190This ZIP190 |
| Median age | 56.3This ZIP56.3Iowa38.6US 38.9 |
| Median household income | $56,250This ZIP$56,250Iowa$75,059US $80,734 |
| Median home value | $155,400This ZIP$155,400Iowa$208,000US $332,700 |
| Bachelor's degree or higher | 14.3%This ZIP14.3% |
| Mean commute | 27.5 minThis ZIP27.5 min |
| Population density | 12.9 / sq miThis ZIP12.9 / sq mi |
Business and tax activity
| Business establishments | 4This ZIP4 |
|---|---|
| Employees | 18This ZIP18 |
| Annual payroll | $867,000This ZIP$867,000 |
| Tax returns filed | 180This ZIP180 |
| Total adjusted gross income | $12,089,000This ZIP$12,089,000 |
Land area
| Land area | 34.27 sq miThis ZIP34.27 sq mi |
|---|---|
| Water area | 0.05 sq miThis ZIP0.05 sq mi |
Counties 52309 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Jackson County | 72.1% |
| Jones County | 27.9% |
Other place names in 52309
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 52309
| ZIP | City | Distance |
|---|---|---|
52207 | Baldwin, IA | 4.0 mi |
52321 | Onslow, IA | 4.9 mi |
52362 | Wyoming, IA | 7.8 mi |
52212 | Center Junction, IA | 10.5 mi |
52323 | Oxford Junction, IA | 10.7 mi |
52060 | Maquoketa, IA | 10.9 mi |
52032 | Bernard, IA | 11.2 mi |
52033 | Cascade, IA | 11.7 mi |
52254 | Lost Nation, IA | 13.1 mi |
52079 | Zwingle, IA | 13.8 mi |
Find every ZIP code within 10 miles of 52309 →
Questions about this ZIP code
Where is ZIP code 52309?
52309 is in Monmouth, Iowa, in Jackson County. Its published point location is 42.1317, -90.8886.
What county is 52309 in?
52309 spans 2 counties: Jackson County and Jones County. Most of it falls in Jackson 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 52309?
Monmouth uses area code 563, from NANPA's telephone records.
What time zone is 52309 in?
52309 uses America/Chicago.
How many people live in 52309?
About 443 people live in ZIP code 52309, in 190 households, at 12.9 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 52309?
$56,250 a year, against $75,059 across Iowa.
What ZIP codes are near 52309?
The closest are 52207 (4 mi), 52321 (4.9 mi), 52362 (7.8 mi), 52212 (10.5 mi) and 52323 (10.7 mi).
Is 52309 a PO Box ZIP code?
52309 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “52309 ZIP Code — Monmouth, Iowa (Jackson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/52309
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/52309.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.