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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/15331

15331

ZIP 15331 is Ellsworth, Pennsylvania, in Washington County; area codes 724 and 878; Eastern time.

Type
Standard
Time zone
America/New_York
County
Washington
Metro area
Pittsburgh, PA
Population
891
Coordinates
40.1053, -80.0226
☼ Live from 15331 — Ellsworth, PA

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Where 15331 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.

★ Weird and wonderful facts about 15331
  • 🔢 Type 15331 into a pocket calculator and turn it upside down: IEESI — not quite a word, sorry.
  • ➕ 15331 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11101111100011
  • 🏠 Its numerical neighbours: 15330 (Eighty Four, PA, 6 mi away) and 15332 (Finleyville, PA, 9 mi away).
  • 🔄 Backwards, 15331 becomes 13351, which is not a ZIP code at all.
  • 👥 11 other ZIP codes are made of exactly the same digits (13135, 13153, 13315, 15133, 15313, 31315, …). The farthest-flung twin is 33151 in Miami, FL, 986 miles away.
  • 🧭 Farther north than 57% of all ZIP codes, and farther east than 74%.
  • 🎯981 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 15331 and you would come out at 40.11°S, 99.98°E — 1,049 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 02m of daylight. Shortest: 9h 19m.
  • 📏 At 0.775 square miles of land, 15331 is bigger than 7% of ZIP codes — about 375 football fields.
🌙 The sky over 15331 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population891This ZIP891
Households365This ZIP365
Housing units402This ZIP402
Median age34.1This ZIP34.1Pennsylvania40.9US 38.9
Median household income$58,750This ZIP$58,750Pennsylvania$77,971US $80,734
Median home value$74,300This ZIP$74,300Pennsylvania$254,500US $332,700
Median gross rent$913This ZIP$913Pennsylvania$1,209US $1,413
Bachelor's degree or higher21.6%This ZIP21.6%
Mean commute26.7 minThis ZIP26.7 min
Population density1,149.7 / sq miThis ZIP1,149.7 / sq mi

Business and tax activity

Business establishments7This ZIP7
Employees10This ZIP10
Annual payroll$307,000This ZIP$307,000

Land area

Land area0.78 sq miThis ZIP0.78 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 15331

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 15331

ZIPCityDistance
15324 Cokeburg, PA 2.3 mi
15314 Bentleyville, PA 2.8 mi
15313 Beallsville, PA 2.9 mi
15360 Scenery Hill, PA 3.3 mi
15358 Richeyville, PA 3.6 mi
15427 Daisytown, PA 3.8 mi
15366 Van Voorhis, PA 4.6 mi
15022 Charleroi, PA 4.6 mi
15423 Coal Center, PA 5.1 mi
15333 Fredericktown, PA 5.2 mi

Find every ZIP code within 10 miles of 15331 →

Questions about this ZIP code

Where is ZIP code 15331?

15331 is in Ellsworth, Pennsylvania, in Washington County, part of the Pittsburgh, PA metropolitan area. Its published point location is 40.1053, -80.0226.

What county is 15331 in?

15331 lies in Washington County.

What area code is 15331?

Ellsworth uses area codes 724 and 878, from NANPA's telephone records.

What time zone is 15331 in?

15331 uses America/New_York.

How many people live in 15331?

About 891 people live in ZIP code 15331, in 365 households, at 1,149.7 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 15331?

$58,750 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 15331?

The closest are 15324 (2.3 mi), 15314 (2.8 mi), 15313 (2.9 mi), 15360 (3.3 mi) and 15358 (3.6 mi).

Is 15331 a PO Box ZIP code?

15331 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “15331 ZIP Code — Ellsworth, Pennsylvania (Washington County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/15331

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