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Where 18831 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 18831 into a pocket calculator and turn it upside down: IEBBI — not quite a word, sorry.
- ➕ As a number, 18,831 = 3 × 6277. Its digits add up to 21, a total 2,594 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100100110001111 - 🏠 Its numerical neighbours: 18830 (Little Meadows, PA, 25 mi away) and 18832 (Monroeton, PA, 15 mi away).
- 🔄 Backwards, 18831 becomes 13881, which is not a ZIP code at all.
- 👥 8 other ZIP codes are made of exactly the same digits (18813, 38118, 38181, 81138, 83118, 83811, …). The farthest-flung twin is 83811 in Clark Fork, ID, 1,957 miles away.
- 🧭 Farther north than 74% of all ZIP codes, and farther east than 83%.
- 🎯1,154 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 18831 and you would come out at 41.89°S, 103.40°E — 970 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 14m of daylight. Shortest: 9h 07m.
- 📏 At 31.9 square miles of land, 18831 is bigger than 47% of ZIP codes — room for about 24 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,081This ZIP1,081 |
|---|---|
| Households | 411This ZIP411 |
| Housing units | 476This ZIP476 |
| Median age | 50.4This ZIP50.4Pennsylvania40.9US 38.9 |
| Median household income | $82,132This ZIP$82,132Pennsylvania$77,971US $80,734 |
| Median home value | $216,900This ZIP$216,900Pennsylvania$254,500US $332,700 |
| Median gross rent | $845This ZIP$845Pennsylvania$1,209US $1,413 |
| Bachelor's degree or higher | 20.4%This ZIP20.4% |
| Mean commute | 26.1 minThis ZIP26.1 min |
| Population density | 33.9 / sq miThis ZIP33.9 / sq mi |
Business and tax activity
| Business establishments | 12This ZIP12 |
|---|---|
| Employees | 86This ZIP86 |
| Annual payroll | $5,047,000This ZIP$5,047,000 |
| Tax returns filed | 590This ZIP590 |
| Total adjusted gross income | $39,662,000This ZIP$39,662,000 |
Land area
| Land area | 31.93 sq miThis ZIP31.93 sq mi |
|---|---|
| Water area | 0.19 sq miThis ZIP0.19 sq mi |
Other place names in 18831
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 18831
| ZIP | City | Distance |
|---|---|---|
18817 | East Smithfield, PA | 2.0 mi |
18810 | Athens, PA | 5.6 mi |
18840 | Sayre, PA | 6.5 mi |
18850 | Ulster, PA | 6.6 mi |
18814 | Burlington, PA | 7.6 mi |
16914 | Columbia Cross Roads, PA | 9.9 mi |
16925 | Gillett, PA | 10.3 mi |
14892 | Waverly, NY | 11.1 mi |
18848 | Towanda, PA | 12.1 mi |
14894 | Wellsburg, NY | 12.6 mi |
Find every ZIP code within 10 miles of 18831 →
Questions about this ZIP code
Where is ZIP code 18831?
18831 is in Milan, Pennsylvania, in Bradford County, part of the Sayre, PA micropolitan area. Its published point location is 41.8942, -76.5981.
What county is 18831 in?
18831 lies in Bradford County.
What area code is 18831?
Milan uses area codes 570 and 272, from NANPA's telephone records.
What time zone is 18831 in?
18831 uses America/New_York.
How many people live in 18831?
About 1,081 people live in ZIP code 18831, in 411 households, at 33.9 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 18831?
$82,132 a year, against $77,971 across Pennsylvania.
What ZIP codes are near 18831?
The closest are 18817 (2 mi), 18810 (5.6 mi), 18840 (6.5 mi), 18850 (6.6 mi) and 18814 (7.6 mi).
Is 18831 a PO Box ZIP code?
18831 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “18831 ZIP Code — Milan, Pennsylvania (Bradford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/18831
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/18831.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.