15321
ZIP 15321 is Cecil, Pennsylvania, mostly in Washington County; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Washington +1 more
- Metro area
- Pittsburgh, PA
- Population
- 2,025
- Coordinates
- 40.3217, -80.1872
Weather right now
Asking the National Weather Service…
Where 15321 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 15321 into a pocket calculator and turn it upside down: IZESI — not quite a word, sorry.
- ➕ As a number, 15,321 = 3 × 5107. Its digits add up to 12, a total 940 other ZIP codes share.
- 💾In binary, the way a computer stores it:
11101111011001 - 🏠 Its numerical neighbours: 15320 (Carmichaels, PA, 33 mi away) and 15322 (Clarksville, PA, 24 mi away).
- 🔄 Backwards, 15321 becomes 12351, which is not a ZIP code at all.
- 👥 29 other ZIP codes are made of exactly the same digits (11235, 11352, 12153, 12513, 12531, 13152, …). The farthest-flung twin is 51231 in Archer, IA, 824 miles away.
- 🧭 Farther north than 59% of all ZIP codes, and farther east than 73%.
- 🎯971 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 15321 and you would come out at 40.32°S, 99.81°E — 1,063 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 03m of daylight. Shortest: 9h 17m.
- 📏 At 1.9 square miles of land, 15321 is bigger than 11% of ZIP codes — room for about 1.4 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,025This ZIP2,025 |
|---|---|
| Households | 760This ZIP760 |
| Housing units | 916This ZIP916 |
| Median age | 29.5This ZIP29.5Pennsylvania40.9US 38.9 |
| Median household income | $117,656This ZIP$117,656Pennsylvania$77,971US $80,734 |
| Median home value | $348,700This ZIP$348,700Pennsylvania$254,500US $332,700 |
| Median gross rent | $1,465This ZIP$1,465Pennsylvania$1,209US $1,413 |
| Bachelor's degree or higher | 54.2%This ZIP54.2% |
| Mean commute | 23.5 minThis ZIP23.5 min |
| Population density | 1,061.3 / sq miThis ZIP1,061.3 / sq mi |
Business and tax activity
| Business establishments | 45This ZIP45 |
|---|---|
| Employees | 206This ZIP206 |
| Annual payroll | $14,198,000This ZIP$14,198,000 |
| Tax returns filed | 940This ZIP940 |
| Total adjusted gross income | $75,898,000This ZIP$75,898,000 |
Land area
| Land area | 1.91 sq miThis ZIP1.91 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Counties 15321 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Washington County | 85.9% |
| Allegheny County | 14.1% |
Other place names in 15321
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 15321
| ZIP | City | Distance |
|---|---|---|
15350 | Muse, PA | 2.1 mi |
15339 | Hendersonville, PA | 2.2 mi |
15031 | Cuddy, PA | 2.2 mi |
15064 | Morgan, PA | 3.1 mi |
15317 | Canonsburg, PA | 3.2 mi |
15017 | Bridgeville, PA | 3.4 mi |
15055 | Lawrence, PA | 3.5 mi |
15057 | Mc Donald, PA | 3.9 mi |
15361 | Southview, PA | 4.0 mi |
15082 | Sturgeon, PA | 4.2 mi |
Find every ZIP code within 10 miles of 15321 →
Questions about this ZIP code
Where is ZIP code 15321?
15321 is in Cecil, Pennsylvania, in Washington County, part of the Pittsburgh, PA metropolitan area. Its published point location is 40.3217, -80.1872.
What county is 15321 in?
15321 spans 2 counties: Washington County and Allegheny County. Most of it falls in Washington 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 time zone is 15321 in?
15321 uses America/New_York.
How many people live in 15321?
About 2,025 people live in ZIP code 15321, in 760 households, at 1,061.3 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 15321?
$117,656 a year, against $77,971 across Pennsylvania.
What ZIP codes are near 15321?
The closest are 15350 (2.1 mi), 15339 (2.2 mi), 15031 (2.2 mi), 15064 (3.1 mi) and 15317 (3.2 mi).
Is 15321 a PO Box ZIP code?
15321 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “15321 ZIP Code — Cecil, Pennsylvania (Washington County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/15321
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/15321.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.