18231
ZIP 18231 is Kelayres, Pennsylvania, in Schuylkill County; area codes 272 and 570; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Schuylkill
- Metro area
- Pottsville, PA
- Population
- 413
- Coordinates
- 40.9007, -76.0046
Weather right now
Asking the National Weather Service…
Where 18231 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 18231 into a pocket calculator and turn it upside down: IEZBI — not quite a word, sorry.
- ➕ As a number, 18,231 = 3 × 59 × 103. Its digits add up to 15, a total 1,657 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100011100110111 - 🏠 Its numerical neighbours: 18230 (Junedale, PA, 4 mi away) and 18232 (Lansford, PA, 8 mi away).
- 🔄 Backwards, 18231 becomes 13281, which is not a ZIP code at all.
- 👥 23 other ZIP codes are made of exactly the same digits (11238, 12138, 12183, 12831, 13218, 13812, …). The farthest-flung twin is 83211 in American Falls, ID, 1,899 miles away.
- 🧭 Farther north than 66% of all ZIP codes, and farther east than 85%.
- 🎯1,187 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 18231 and you would come out at 40.90°S, 104.00°E — 903 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 14m.
- 📏 At 0.115 square miles of land, 18231 is bigger than 1% of ZIP codes — about 56 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 413This ZIP413 |
|---|---|
| Households | 181This ZIP181 |
| Housing units | 192This ZIP192 |
| Median age | 32.9This ZIP32.9Pennsylvania40.9US 38.9 |
| Median household income | $49,539This ZIP$49,539Pennsylvania$77,971US $80,734 |
| Median home value | $118,000This ZIP$118,000Pennsylvania$254,500US $332,700 |
| Median gross rent | $821This ZIP$821Pennsylvania$1,209US $1,413 |
| Bachelor's degree or higher | 12.2%This ZIP12.2% |
| Mean commute | 15.1 minThis ZIP15.1 min |
| Population density | 3,591.3 / sq miThis ZIP3,591.3 / sq mi |
Land area
| Land area | 0.12 sq miThis ZIP0.12 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 18231
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 18231
| ZIP | City | Distance |
|---|---|---|
18254 | Tresckow, PA | 2.3 mi |
18237 | Mcadoo, PA | 2.8 mi |
18245 | Quakake, PA | 3.6 mi |
18230 | Junedale, PA | 4.1 mi |
18202 | Hazleton, PA | 4.3 mi |
18201 | Hazleton, PA | 4.4 mi |
18248 | Sheppton, PA | 4.7 mi |
18225 | Harleigh, PA | 5.8 mi |
18220 | Delano, PA | 5.9 mi |
18242 | Oneida, PA | 6.2 mi |
Find every ZIP code within 10 miles of 18231 →
Questions about this ZIP code
Where is ZIP code 18231?
18231 is in Kelayres, Pennsylvania, in Schuylkill County, part of the Pottsville, PA micropolitan area. Its published point location is 40.9007, -76.0046.
What county is 18231 in?
18231 lies in Schuylkill County.
What area code is 18231?
Kelayres uses area codes 272 and 570, from NANPA's telephone records.
What time zone is 18231 in?
18231 uses America/New_York.
How many people live in 18231?
About 413 people live in ZIP code 18231, in 181 households, at 3,591.3 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 18231?
$49,539 a year, against $77,971 across Pennsylvania.
What ZIP codes are near 18231?
The closest are 18254 (2.3 mi), 18237 (2.8 mi), 18245 (3.6 mi), 18230 (4.1 mi) and 18202 (4.3 mi).
Is 18231 a PO Box ZIP code?
18231 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “18231 ZIP Code — Kelayres, Pennsylvania (Schuylkill County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/18231
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/18231.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.