Weather right now
Asking the National Weather Service…
Where 42539 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 42539 into a pocket calculator and turn it upside down: GESZh — not quite a word, sorry.
- ➕ As a number, 42,539 = 7 × 59 × 103. Its digits add up to 23, a total 2,533 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1010011000101011 - 🏠 Its numerical neighbours: 42533 (Ferguson, KY, 26 mi away) and 42541 (Middleburg, KY, 9 mi away).
- 🔄 Backwards, 42539 becomes 93524 — and that is a real ZIP code: Edwards, CA, 1,833 miles away.
- 👥 48 other ZIP codes are made of exactly the same digits (23459, 23954, 24539, 24593, 24935, 25943, …). The farthest-flung twin is 95432 in Elk, CA, 2,089 miles away.
- 🧭 Farther south than 63% of all ZIP codes, and farther east than 57%.
- 🎯756 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 42539 and you would come out at 37.31°S, 95.05°E — 1,237 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 44m of daylight. Shortest: 9h 35m.
- 📏 At 219.6 square miles of land, 42539 is bigger than 92% of ZIP codes — room for about 167 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 9,249This ZIP9,249 |
|---|---|
| Households | 3,834This ZIP3,834 |
| Housing units | 4,458This ZIP4,458 |
| Median age | 42.9This ZIP42.9Kentucky39.1US 38.9 |
| Median household income | $40,862This ZIP$40,862Kentucky$63,726US $80,734 |
| Median home value | $130,500This ZIP$130,500Kentucky$205,600US $332,700 |
| Median gross rent | $674This ZIP$674Kentucky$967US $1,413 |
| Bachelor's degree or higher | 11.9%This ZIP11.9% |
| Mean commute | 25.3 minThis ZIP25.3 min |
| Population density | 42.1 / sq miThis ZIP42.1 / sq mi |
Business and tax activity
| Business establishments | 184This ZIP184 |
|---|---|
| Employees | 2,077This ZIP2,077 |
| Annual payroll | $75,222,000This ZIP$75,222,000 |
| Tax returns filed | 3,810This ZIP3,810 |
| Total adjusted gross income | $173,919,000This ZIP$173,919,000 |
Land area
| Land area | 219.65 sq miThis ZIP219.65 sq mi |
|---|---|
| Water area | 0.86 sq miThis ZIP0.86 sq mi |
Counties 42539 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Casey County | 98.9% |
| Adair County | 1.1% |
Other place names in 42539
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 42539
| ZIP | City | Distance |
|---|---|---|
42541 | Middleburg, KY | 8.9 mi |
42566 | Yosemite, KY | 9.5 mi |
42528 | Dunnville, KY | 9.7 mi |
42516 | Bethelridge, KY | 10.9 mi |
40442 | Kings Mountain, KY | 11.7 mi |
40437 | Hustonville, KY | 11.8 mi |
42565 | Windsor, KY | 11.8 mi |
42753 | Knifley, KY | 12.5 mi |
42733 | Elk Horn, KY | 13.2 mi |
40009 | Bradfordsville, KY | 14.2 mi |
Find every ZIP code within 10 miles of 42539 →
Questions about this ZIP code
Where is ZIP code 42539?
42539 is in Liberty, Kentucky, in Casey County. Its published point location is 37.3091, -84.9510.
What county is 42539 in?
42539 spans 2 counties: Casey County and Adair County. Most of it falls in Casey 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 42539?
Liberty uses area code 606, from NANPA's telephone records.
What time zone is 42539 in?
42539 uses America/New_York.
How many people live in 42539?
About 9,249 people live in ZIP code 42539, in 3,834 households, at 42.1 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 42539?
$40,862 a year, against $63,726 across Kentucky.
What ZIP codes are near 42539?
The closest are 42541 (8.9 mi), 42566 (9.5 mi), 42528 (9.7 mi), 42516 (10.9 mi) and 40442 (11.7 mi).
Is 42539 a PO Box ZIP code?
42539 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “42539 ZIP Code — Liberty, Kentucky (Casey County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/42539
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/42539.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.