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Where 56731 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 56731 into a pocket calculator and turn it upside down: IELgS — not quite a word, sorry.
- ➕ 56731 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1101110110011011 - 🏠 Its numerical neighbours: 56729 (Halma, MN, 28 mi away) and 56732 (Karlstad, MN, 36 mi away).
- 🔄 Backwards, 56731 becomes 13765, which is not a ZIP code at all.
- 👥 62 other ZIP codes are made of exactly the same digits (13657, 13675, 13756, 15367, 15376, 15637, …). The farthest-flung twin is 31567 in West Green, GA, 1,409 miles away.
- 🧭 Farther north than 98% of all ZIP codes, and farther west than 74%.
- 🎯632 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 56731 and you would come out at 48.91°S, 82.93°E — 575 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 16h 11m of daylight. Shortest: 8h 14m.
- 📏 At 38.5 square miles of land, 56731 is bigger than 52% of ZIP codes — room for about 29 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 137This ZIP137 |
|---|---|
| Households | 63This ZIP63 |
| Housing units | 66This ZIP66 |
| Median age | 52.1This ZIP52.1Minnesota38.8US 38.9 |
| Median household income | $75,125This ZIP$75,125Minnesota$89,062US $80,734 |
| Median home value | $148,200This ZIP$148,200Minnesota$329,300US $332,700 |
| Bachelor's degree or higher | 21.4%This ZIP21.4% |
| Mean commute | 19.8 minThis ZIP19.8 min |
| Population density | 3.6 / sq miThis ZIP3.6 / sq mi |
Business and tax activity
| Business establishments | 3This ZIP3 |
|---|---|
| Employees | 8This ZIP8 |
| Annual payroll | $859,000This ZIP$859,000 |
Land area
| Land area | 38.46 sq miThis ZIP38.46 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
Other place names in 56731
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 56731
| ZIP | City | Distance |
|---|---|---|
56755 | Saint Vincent, MN | 4.4 mi |
56740 | Noyes, MN | 8.4 mi |
58271 | Pembina, ND | 9.9 mi |
56728 | Hallock, MN | 9.9 mi |
58216 | Bathgate, ND | 17.0 mi |
58238 | Hamilton, ND | 17.4 mi |
56735 | Lancaster, MN | 19.9 mi |
56733 | Kennedy, MN | 20.6 mi |
58225 | Drayton, ND | 21.9 mi |
56734 | Lake Bronson, MN | 23.5 mi |
Find every ZIP code within 10 miles of 56731 →
Questions about this ZIP code
Where is ZIP code 56731?
56731 is in Humboldt, Minnesota, in Kittson County. Its published point location is 48.9130, -97.0726.
What county is 56731 in?
56731 lies in Kittson County.
What area code is 56731?
Humboldt uses area code 218, from NANPA's telephone records.
What time zone is 56731 in?
56731 uses America/Chicago.
How many people live in 56731?
About 137 people live in ZIP code 56731, in 63 households, at 3.6 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 56731?
$75,125 a year, against $89,062 across Minnesota.
What ZIP codes are near 56731?
The closest are 56755 (4.4 mi), 56740 (8.4 mi), 58271 (9.9 mi), 56728 (9.9 mi) and 58216 (17 mi).
Is 56731 a PO Box ZIP code?
56731 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “56731 ZIP Code — Humboldt, Minnesota (Kittson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/56731
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/56731.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.