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Where 51234 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 51234 into a pocket calculator and turn it upside down: hEZIS — not quite a word, sorry.
- ➕ As a number, 51,234 = 2 × 3 × 8539. Its digits add up to 15, a total 1,657 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100000100010 - 🏠 Its numerical neighbours: 51232 (Ashton, IA, 13 mi away) and 51235 (Doon, IA, 12 mi away).
- 🔄 Backwards, 51234 becomes 43215 — and that is a real ZIP code: Columbus, OH, 707 miles away.
- 👥 66 other ZIP codes are made of exactly the same digits (12345, 12435, 12453, 12534, 12543, 13425, …). The farthest-flung twin is 34251 in Myakka City, FL, 1,339 miles away.
- 🧭 Farther north than 84% of all ZIP codes, and farther west than 71%.
- 🎯267 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51234 and you would come out at 43.19°S, 83.98°E — 781 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 49.8 square miles of land, 51234 is bigger than 59% of ZIP codes — room for about 38 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,172This ZIP1,172 |
|---|---|
| Households | 412This ZIP412 |
| Housing units | 414This ZIP414 |
| Median age | 32.3This ZIP32.3Iowa38.6US 38.9 |
| Median household income | $84,318This ZIP$84,318Iowa$75,059US $80,734 |
| Median home value | $211,800This ZIP$211,800Iowa$208,000US $332,700 |
| Median gross rent | $762This ZIP$762Iowa$972US $1,413 |
| Bachelor's degree or higher | 28.0%This ZIP28.0% |
| Mean commute | 13.8 minThis ZIP13.8 min |
| Population density | 23.5 / sq miThis ZIP23.5 / sq mi |
Business and tax activity
| Business establishments | 22This ZIP22 |
|---|---|
| Employees | 529This ZIP529 |
| Annual payroll | $30,276,000This ZIP$30,276,000 |
| Tax returns filed | 570This ZIP570 |
| Total adjusted gross income | $49,464,000This ZIP$49,464,000 |
Land area
| Land area | 49.80 sq miThis ZIP49.80 sq mi |
|---|---|
| Water area | 0.00 sq miThis ZIP0.00 sq mi |
Other place names in 51234
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51234
| ZIP | City | Distance |
|---|---|---|
51244 | Matlock, IA | 5.6 mi |
51239 | Hull, IA | 6.5 mi |
51201 | Sheldon, IA | 7.8 mi |
51237 | George, IA | 10.0 mi |
51238 | Hospers, IA | 10.4 mi |
51250 | Sioux Center, IA | 11.7 mi |
51041 | Orange City, IA | 12.0 mi |
51235 | Doon, IA | 12.2 mi |
51232 | Ashton, IA | 12.7 mi |
51003 | Alton, IA | 14.1 mi |
Find every ZIP code within 10 miles of 51234 →
Questions about this ZIP code
Where is ZIP code 51234?
51234 is in Boyden, Iowa, in Sioux County. Its published point location is 43.1922, -96.0193.
What county is 51234 in?
51234 lies in Sioux County.
What area code is 51234?
Boyden uses area code 712, from NANPA's telephone records.
What time zone is 51234 in?
51234 uses America/Chicago.
How many people live in 51234?
About 1,172 people live in ZIP code 51234, in 412 households, at 23.5 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 51234?
$84,318 a year, against $75,059 across Iowa.
What ZIP codes are near 51234?
The closest are 51244 (5.6 mi), 51239 (6.5 mi), 51201 (7.8 mi), 51237 (10 mi) and 51238 (10.4 mi).
Is 51234 a PO Box ZIP code?
51234 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51234 ZIP Code — Boyden, Iowa (Sioux County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51234
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51234.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.