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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/08550

08550

ZIP 08550 is Princeton Junction, New Jersey, in Mercer County; area codes 609 and 640; Eastern time.

Type
Standard
Time zone
America/New_York
County
Mercer
Population
21,067
Coordinates
40.2800, -74.6221
☼ Live from 08550 — Princeton Junction, NJ

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Where 08550 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 08550
  • 🔢 Type 08550 into a pocket calculator and turn it upside down: OSSBO — not quite a word, sorry.
  • ➕ As a number, 8,550 = 2 × 3 × 3 × 5 × 5 × 19. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10000101100110
  • 🏠 Its numerical neighbours: 08544 (Princeton, NJ, 5 mi away) and 08551 (Ringoes, NJ, 16 mi away).
  • 🔄 Backwards, 08550 becomes 05580, which is not a ZIP code at all.
  • 👥 12 other ZIP codes are made of exactly the same digits (05058, 05085, 05850, 08055, 08505, 50058, …). The farthest-flung twin is 85005 in Phoenix, AZ, 2,107 miles away.
  • 🧭 Farther north than 59% of all ZIP codes, and farther east than 88%.
  • 🎯1,264 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 08550 and you would come out at 40.28°S, 105.38°E — 819 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 03m of daylight. Shortest: 9h 18m.
  • 📏 At 19.1 square miles of land, 08550 is bigger than 37% of ZIP codes — room for about 15 Central Parks.
🌙 The sky over 08550 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population21,067This ZIP21,067
Households7,817This ZIP7,817
Housing units7,941This ZIP7,941
Median age45.4This ZIP45.4New Jersey40.1US 38.9
Median household income$224,213This ZIP$224,213New Jersey$103,556US $80,734
Median home value$807,200This ZIP$807,200New Jersey$454,400US $332,700
Median gross rent$2,584This ZIP$2,584New Jersey$1,720US $1,413
Bachelor's degree or higher85.5%This ZIP85.5%
Mean commute43.1 minThis ZIP43.1 min
Population density1,101.0 / sq miThis ZIP1,101.0 / sq mi

Business and tax activity

Business establishments448This ZIP448
Employees4,146This ZIP4,146
Annual payroll$223,048,000This ZIP$223,048,000
Tax returns filed9,470This ZIP9,470
Total adjusted gross income$2,360,285,000This ZIP$2,360,285,000

Land area

Land area19.13 sq miThis ZIP19.13 sq mi
Water area0.59 sq miThis ZIP0.59 sq mi

Other place names in 08550

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

ZIP codes near 08550

ZIPCityDistance
08561 Windsor, NJ 3.1 mi
08536 Plainsboro, NJ 4.1 mi
08690 Trenton, NJ 4.2 mi
08520 Hightstown, NJ 4.6 mi
08619 Trenton, NJ 4.7 mi
08543 Princeton, NJ 4.7 mi
08601 Trenton, NJ 4.7 mi
08602 Trenton, NJ 4.7 mi
08603 Trenton, NJ 4.7 mi
08604 Trenton, NJ 4.7 mi

Find every ZIP code within 10 miles of 08550 →

Questions about this ZIP code

Where is ZIP code 08550?

08550 is in Princeton Junction, New Jersey, in Mercer County, part of the Trenton-Princeton, NJ metropolitan area. Its published point location is 40.2800, -74.6221.

What county is 08550 in?

08550 lies in Mercer County.

What area code is 08550?

Princeton Junction uses area codes 609 and 640, from NANPA's telephone records.

What time zone is 08550 in?

08550 uses America/New_York.

How many people live in 08550?

About 21,067 people live in ZIP code 08550, in 7,817 households, at 1,101.0 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 08550?

$224,213 a year, against $103,556 across New Jersey.

What ZIP codes are near 08550?

The closest are 08561 (3.1 mi), 08536 (4.1 mi), 08690 (4.2 mi), 08520 (4.6 mi) and 08619 (4.7 mi).

Is 08550 a PO Box ZIP code?

08550 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “08550 ZIP Code — Princeton Junction, New Jersey (Mercer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/08550

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