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Where 40831 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 40831 into a pocket calculator and turn it upside down: IEBOh — not quite a word, sorry.
- ➕ As a number, 40,831 = 7 × 19 × 307. Its digits add up to 16, a total 1,922 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1001111101111111 - 🏠 Its numerical neighbours: 40830 (Gulston, KY, 1 mi away) and 40840 (Helton, KY, 14 mi away).
- 🔄 Backwards, 40831 becomes 13804 — and that is a real ZIP code: Masonville, NY, 567 miles away.
- 👥 54 other ZIP codes are made of exactly the same digits (01438, 01834, 01843, 03814, 03841, 08314, …). The farthest-flung twin is 84301 in Bear River City, UT, 1,571 miles away.
- 🧭 Farther south than 65% of all ZIP codes, and farther east than 62%.
- 🎯853 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 40831 and you would come out at 36.76°S, 96.67°E — 1,142 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 41m of daylight. Shortest: 9h 38m.
- 📏 At 67.3 square miles of land, 40831 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 | 4,789This ZIP4,789 |
|---|---|
| Households | 2,167This ZIP2,167 |
| Housing units | 2,431This ZIP2,431 |
| Median age | 42.5This ZIP42.5Kentucky39.1US 38.9 |
| Median household income | $35,404This ZIP$35,404Kentucky$63,726US $80,734 |
| Median home value | $89,100This ZIP$89,100Kentucky$205,600US $332,700 |
| Median gross rent | $620This ZIP$620Kentucky$967US $1,413 |
| Bachelor's degree or higher | 20.2%This ZIP20.2% |
| Mean commute | 20.0 minThis ZIP20.0 min |
| Population density | 71.1 / sq miThis ZIP71.1 / sq mi |
Business and tax activity
| Business establishments | 186This ZIP186 |
|---|---|
| Employees | 2,771This ZIP2,771 |
| Annual payroll | $107,305,000This ZIP$107,305,000 |
| Tax returns filed | 1,700This ZIP1,700 |
| Total adjusted gross income | $104,245,000This ZIP$104,245,000 |
Land area
| Land area | 67.33 sq miThis ZIP67.33 sq mi |
|---|---|
| Water area | 0.63 sq miThis ZIP0.63 sq mi |
Other place names in 40831
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 40831
| ZIP | City | Distance |
|---|---|---|
40830 | Gulston, KY | 1.1 mi |
40964 | Mary Alice, KY | 1.6 mi |
40829 | Grays Knob, KY | 2.9 mi |
40824 | Dayhoit, KY | 5.2 mi |
40873 | Wallins Creek, KY | 5.3 mi |
40815 | Cawood, KY | 5.7 mi |
24218 | Ben Hur, VA | 5.9 mi |
40863 | Pathfork, KY | 6.1 mi |
40854 | Loyall, KY | 6.2 mi |
40818 | Coalgood, KY | 6.4 mi |
Find every ZIP code within 10 miles of 40831 →
Questions about this ZIP code
Where is ZIP code 40831?
40831 is in Harlan, Kentucky, in Harlan County. Its published point location is 36.7602, -83.3286.
What county is 40831 in?
40831 lies in Harlan County.
What area code is 40831?
Harlan uses area code 606, from NANPA's telephone records.
What time zone is 40831 in?
40831 uses America/New_York.
How many people live in 40831?
About 4,789 people live in ZIP code 40831, in 2,167 households, at 71.1 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 40831?
$35,404 a year, against $63,726 across Kentucky.
What ZIP codes are near 40831?
The closest are 40830 (1.1 mi), 40964 (1.6 mi), 40829 (2.9 mi), 40824 (5.2 mi) and 40873 (5.3 mi).
Is 40831 a PO Box ZIP code?
40831 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “40831 ZIP Code — Harlan, Kentucky (Harlan County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40831
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/40831.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.