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Where 40840 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 40840 into a pocket calculator and turn it upside down: OhBOh — not quite a word, sorry.
- ➕ As a number, 40,840 = 2 × 2 × 2 × 5 × 1021. Its digits add up to 16, a total 1,922 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1001111110001000 - 🏠 Its numerical neighbours: 40831 (Harlan, KY, 14 mi away) and 40843 (Holmes Mill, KY, 27 mi away).
- 🔄 Backwards, 40840 becomes 04804, which is not a ZIP code at all.
- 👥 12 other ZIP codes are made of exactly the same digits (04048, 04084, 04408, 08404, 40048, 44080, …). The farthest-flung twin is 84040 in Layton, UT, 1,548 miles away.
- 🧭 Farther south than 64% of all ZIP codes, and farther east than 62%.
- 🎯844 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 40840 and you would come out at 36.94°S, 96.58°E — 1,149 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 42m of daylight. Shortest: 9h 37m.
- 📏 At 41.8 square miles of land, 40840 is bigger than 55% of ZIP codes — room for about 32 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 355This ZIP355 |
|---|---|
| Households | 199This ZIP199 |
| Housing units | 272This ZIP272 |
| Median age | 51.8This ZIP51.8Kentucky39.1US 38.9 |
| Bachelor's degree or higher | 8.2%This ZIP8.2% |
| Population density | 8.5 / sq miThis ZIP8.5 / sq mi |
Business and tax activity
| Tax returns filed | 100This ZIP100 |
|---|---|
| Total adjusted gross income | $3,956,000This ZIP$3,956,000 |
Land area
| Land area | 41.81 sq miThis ZIP41.81 sq mi |
|---|---|
| Water area | 0.17 sq miThis ZIP0.17 sq mi |
ZIP codes near 40840
| ZIP | City | Distance |
|---|---|---|
40874 | Warbranch, KY | 4.3 mi |
40858 | Mozelle, KY | 4.7 mi |
40816 | Chappell, KY | 5.5 mi |
40979 | Roark, KY | 6.1 mi |
40803 | Asher, KY | 7.0 mi |
40854 | Loyall, KY | 7.6 mi |
40810 | Bledsoe, KY | 7.7 mi |
40806 | Baxter, KY | 7.7 mi |
40988 | Stoney Fork, KY | 7.7 mi |
40913 | Beverly, KY | 7.7 mi |
Find every ZIP code within 10 miles of 40840 →
Questions about this ZIP code
Where is ZIP code 40840?
40840 is in Helton, Kentucky, in Leslie County. Its published point location is 36.9446, -83.4190.
What county is 40840 in?
40840 lies in Leslie County.
What area code is 40840?
Helton uses area code 606, from NANPA's telephone records.
What time zone is 40840 in?
40840 uses America/New_York.
How many people live in 40840?
About 355 people live in ZIP code 40840, in 199 households, at 8.5 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 40840?
The closest are 40874 (4.3 mi), 40858 (4.7 mi), 40816 (5.5 mi), 40979 (6.1 mi) and 40803 (7 mi).
Is 40840 a PO Box ZIP code?
40840 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “40840 ZIP Code — Helton, Kentucky (Leslie County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40840
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/40840.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.