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Where 52237 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 52237 into a pocket calculator and turn it upside down: LEZZS — not quite a word, sorry.
- ➕ 52237 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100110000001101 - 🏠 Its numerical neighbours: 52236 (Homestead, IA, 53 mi away) and 52240 (Iowa City, IA, 51 mi away).
- 🔄 Backwards, 52237 becomes 73225, which is not a ZIP code at all.
- 👥 25 other ZIP codes are made of exactly the same digits (22735, 25327, 25723, 27235, 27253, 27325, …). The farthest-flung twin is 32752 in Longwood, FL, 1,094 miles away.
- 🧭 Farther north than 78% of all ZIP codes, and farther west than 59%.
- 🎯419 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 52237 and you would come out at 42.34°S, 88.75°E — 1,011 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 84.1 square miles of land, 52237 is bigger than 74% of ZIP codes — room for about 64 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,830This ZIP1,830 |
|---|---|
| Households | 585This ZIP585 |
| Housing units | 661This ZIP661 |
| Median age | 27.7This ZIP27.7Iowa38.6US 38.9 |
| Median household income | $84,063This ZIP$84,063Iowa$75,059US $80,734 |
| Median home value | $166,800This ZIP$166,800Iowa$208,000US $332,700 |
| Median gross rent | $416This ZIP$416Iowa$972US $1,413 |
| Bachelor's degree or higher | 17.4%This ZIP17.4% |
| Mean commute | 32.2 minThis ZIP32.2 min |
| Population density | 21.8 / sq miThis ZIP21.8 / sq mi |
Business and tax activity
| Business establishments | 29This ZIP29 |
|---|---|
| Employees | 164This ZIP164 |
| Annual payroll | $7,228,000This ZIP$7,228,000 |
| Tax returns filed | 680This ZIP680 |
| Total adjusted gross income | $47,465,000This ZIP$47,465,000 |
Land area
| Land area | 84.12 sq miThis ZIP84.12 sq mi |
|---|---|
| Water area | 0.04 sq miThis ZIP0.04 sq mi |
Counties 52237 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Delaware County | 95.6% |
| Jones County | 2.9% |
| Dubuque County | 1.5% |
Other place names in 52237
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 52237
| ZIP | City | Distance |
|---|---|---|
52223 | Delhi, IA | 6.2 mi |
52078 | Worthington, IA | 7.9 mi |
52310 | Monticello, IA | 8.8 mi |
52252 | Langworthy, IA | 10.0 mi |
52036 | Delaware, IA | 10.2 mi |
52219 | Prairieburg, IA | 11.4 mi |
52041 | Earlville, IA | 11.4 mi |
52040 | Dyersville, IA | 12.6 mi |
52330 | Ryan, IA | 12.7 mi |
52033 | Cascade, IA | 13.5 mi |
Find every ZIP code within 10 miles of 52237 →
Questions about this ZIP code
Where is ZIP code 52237?
52237 is in Hopkinton, Iowa, in Delaware County. Its published point location is 42.3408, -91.2520.
What county is 52237 in?
52237 spans 3 counties: Delaware County, Jones County and Dubuque County. Most of it falls in Delaware 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 52237?
Hopkinton uses area code 563, from NANPA's telephone records.
What time zone is 52237 in?
52237 uses America/Chicago.
How many people live in 52237?
About 1,830 people live in ZIP code 52237, in 585 households, at 21.8 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 52237?
$84,063 a year, against $75,059 across Iowa.
What ZIP codes are near 52237?
The closest are 52223 (6.2 mi), 52078 (7.9 mi), 52310 (8.8 mi), 52252 (10 mi) and 52036 (10.2 mi).
Is 52237 a PO Box ZIP code?
52237 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “52237 ZIP Code — Hopkinton, Iowa (Delaware County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/52237
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/52237.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.