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Where 51239 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 51239 into a pocket calculator and turn it upside down: GEZIS — not quite a word, sorry.
- ➕ 51239 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100000100111 - 🏠 Its numerical neighbours: 51238 (Hospers, IA, 16 mi away) and 51240 (Inwood, IA, 17 mi away).
- 🔄 Backwards, 51239 becomes 93215 — and that is a real ZIP code: Delano, CA, 1,326 miles away.
- 👥 49 other ZIP codes are made of exactly the same digits (12935, 12953, 15239, 15329, 15923, 19352, …). The farthest-flung twin is 95123 in San Jose, CA, 1,410 miles away.
- 🧭 Farther north than 84% of all ZIP codes, and farther west than 72%.
- 🎯265 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51239 and you would come out at 43.20°S, 83.85°E — 775 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 23m of daylight. Shortest: 8h 59m.
- 📏 At 67.0 square miles of land, 51239 is bigger than 68% of ZIP codes — room for about 51 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,876This ZIP2,876 |
|---|---|
| Households | 1,051This ZIP1,051 |
| Housing units | 1,085This ZIP1,085 |
| Median age | 35.2This ZIP35.2Iowa38.6US 38.9 |
| Median household income | $77,540This ZIP$77,540Iowa$75,059US $80,734 |
| Median home value | $236,500This ZIP$236,500Iowa$208,000US $332,700 |
| Bachelor's degree or higher | 20.6%This ZIP20.6% |
| Mean commute | 13.8 minThis ZIP13.8 min |
| Population density | 42.9 / sq miThis ZIP42.9 / sq mi |
Business and tax activity
| Business establishments | 145This ZIP145 |
|---|---|
| Employees | 1,250This ZIP1,250 |
| Annual payroll | $63,912,000This ZIP$63,912,000 |
| Tax returns filed | 1,460This ZIP1,460 |
| Total adjusted gross income | $131,101,000This ZIP$131,101,000 |
Land area
| Land area | 67.00 sq miThis ZIP67.00 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
Counties 51239 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Sioux County | 92.7% |
| Lyon County | 7.3% |
Other place names in 51239
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51239
| ZIP | City | Distance |
|---|---|---|
51234 | Boyden, IA | 6.5 mi |
51235 | Doon, IA | 7.2 mi |
51250 | Sioux Center, IA | 8.3 mi |
51247 | Rock Valley, IA | 9.6 mi |
51244 | Matlock, IA | 11.1 mi |
51237 | George, IA | 11.7 mi |
51041 | Orange City, IA | 12.9 mi |
51230 | Alvord, IA | 13.7 mi |
51201 | Sheldon, IA | 14.3 mi |
51246 | Rock Rapids, IA | 15.6 mi |
Find every ZIP code within 10 miles of 51239 →
Questions about this ZIP code
Where is ZIP code 51239?
51239 is in Hull, Iowa, in Sioux County. Its published point location is 43.2039, -96.1475.
What county is 51239 in?
51239 spans 2 counties: Sioux County and Lyon County. Most of it falls in Sioux 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 51239?
Hull uses area code 712, from NANPA's telephone records.
What time zone is 51239 in?
51239 uses America/Chicago.
How many people live in 51239?
About 2,876 people live in ZIP code 51239, in 1,051 households, at 42.9 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 51239?
$77,540 a year, against $75,059 across Iowa.
What ZIP codes are near 51239?
The closest are 51234 (6.5 mi), 51235 (7.2 mi), 51250 (8.3 mi), 51247 (9.6 mi) and 51244 (11.1 mi).
Is 51239 a PO Box ZIP code?
51239 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51239 ZIP Code — Hull, Iowa (Sioux County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51239
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51239.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.