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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/15689

15689

ZIP 15689 is United, Pennsylvania, in Westmoreland County; area codes 724 and 878; Eastern time.

Type
Standard
Time zone
America/New_York
County
Westmoreland
Metro area
Pittsburgh, PA
Population
92
Coordinates
40.2253, -79.4917
☼ Live from 15689 — United, PA

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Local time: —

Where 15689 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 15689
  • 🔢 Type 15689 into a pocket calculator and turn it upside down: GBgSI — not quite a word, sorry.
  • ➕ As a number, 15,689 = 29 × 541. Its digits add up to 29, a total 1,296 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11110101001001
  • 🏠 Its numerical neighbours: 15688 (Tarrs, PA, 6 mi away) and 15690 (Vandergrift, PA, 29 mi away).
  • 🔄 Backwards, 15689 becomes 98651 — and that is a real ZIP code: Underwood, WA, 2,136 miles away.
  • 👥 17 other ZIP codes are made of exactly the same digits (15698, 16859, 18956, 61859, 85619, 89156, …). The farthest-flung twin is 96518 in APO AA, a military post office, 6,529 miles away.
  • 🧭 Farther north than 58% of all ZIP codes, and farther east than 75%.
  • 🎯1,008 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 15689 and you would come out at 40.23°S, 100.51°E — 1,028 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 02m of daylight. Shortest: 9h 18m.
  • 📏 At 0.362 square miles of land, 15689 is bigger than 4% of ZIP codes — about 175 football fields.
🌙 The sky over 15689 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population92This ZIP92
Households40This ZIP40
Housing units40This ZIP40
Median age55.1This ZIP55.1Pennsylvania40.9US 38.9
Bachelor's degree or higher0.0%
Population density254.1 / sq miThis ZIP254.1 / sq mi

Business and tax activity

Business establishments3This ZIP3
Employees38This ZIP38
Annual payroll$1,013,000This ZIP$1,013,000

Land area

Land area0.36 sq miThis ZIP0.36 sq mi
Water area0.00 sq mi

Other place names in 15689

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

ZIP codes near 15689

ZIPCityDistance
15621 Calumet, PA 1.0 mi
15674 Norvelt, PA 1.3 mi
15676 Pleasant Unity, PA 2.1 mi
15616 Armbrust, PA 3.2 mi
15666 Mount Pleasant, PA 4.5 mi
15697 Youngwood, PA 4.8 mi
15693 Whitney, PA 4.8 mi
15638 Hostetter, PA 5.5 mi
15639 Hunker, PA 5.6 mi
15606 Greensburg, PA 5.8 mi

Find every ZIP code within 10 miles of 15689 →

Questions about this ZIP code

Where is ZIP code 15689?

15689 is in United, Pennsylvania, in Westmoreland County, part of the Pittsburgh, PA metropolitan area. Its published point location is 40.2253, -79.4917.

What county is 15689 in?

15689 lies in Westmoreland County.

What area code is 15689?

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

What time zone is 15689 in?

15689 uses America/New_York.

How many people live in 15689?

About 92 people live in ZIP code 15689, in 40 households, at 254.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 15689?

The closest are 15621 (1 mi), 15674 (1.3 mi), 15676 (2.1 mi), 15616 (3.2 mi) and 15666 (4.5 mi).

Is 15689 a PO Box ZIP code?

15689 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “15689 ZIP Code — United, Pennsylvania (Westmoreland County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/15689

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