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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/08544

08544

ZIP 08544 is in Princeton, New Jersey, in Mercer County; area codes 609 and 640; Eastern time. Princeton has 5 ZIP codes; the others are 08540, 08541, 08542 and 08543.

Type
Standard
Time zone
America/New_York
County
Mercer
Population
4,392
Coordinates
40.3465, -74.6578
☼ Live from 08544 — Princeton, NJ

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Local time: —

Where 08544 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 08544
  • 🔢 Type 08544 into a pocket calculator and turn it upside down: hhSBO — not quite a word, sorry.
  • ➕ As a number, 8,544 = 2 × 2 × 2 × 2 × 2 × 3 × 89. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10000101100000
  • 🏠 Its numerical neighbours: 08543 (Princeton, NJ, 5 mi away) and 08550 (Princeton Junction, NJ, 5 mi away).
  • 🔄 Backwards, 08544 becomes 44580, which is not a ZIP code at all.
  • 👥 28 other ZIP codes are made of exactly the same digits (04485, 04548, 04854, 05448, 40845, 40854, …). The farthest-flung twin is 85044 in Phoenix, AZ, 2,105 miles away.
  • 🧭 Farther north than 60% of all ZIP codes, and farther east than 88%.
  • 🎯1,261 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 08544 and you would come out at 40.35°S, 105.34°E — 824 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 03m of daylight. Shortest: 9h 17m.
  • 📏 At 0.166 square miles of land, 08544 is bigger than 2% of ZIP codes — about 80 football fields.
🌙 The sky over 08544 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population4,392This ZIP4,392
Households12This ZIP12
Housing units12This ZIP12
Median age20.4This ZIP20.4New Jersey40.1US 38.9
Bachelor's degree or higher90.7%This ZIP90.7%
Mean commute14.7 minThis ZIP14.7 min
Population density26,457.8 / sq miThis ZIP26,457.8 / sq mi

Business and tax activity

Business establishments15This ZIP15
Employees11,979This ZIP11,979
Annual payroll$911,266,000This ZIP$911,266,000

Land area

Land area0.17 sq miThis ZIP0.17 sq mi
Water area0.00 sq mi

Other place names in 08544

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

ZIP codes near 08544

ZIPCityDistance
08541 Princeton, NJ 0.2 mi
08542 Princeton, NJ 0.6 mi
08540 Princeton, NJ 1.3 mi
08528 Kingston, NJ 3.5 mi
08553 Rocky Hill, NJ 3.9 mi
08536 Plainsboro, NJ 3.9 mi
08504 Blawenburg, NJ 4.8 mi
08550 Princeton Junction, NJ 5.0 mi
08558 Skillman, NJ 5.2 mi
08648 Lawrence Township, NJ 5.3 mi

Find every ZIP code within 10 miles of 08544 →

Questions about this ZIP code

Where is ZIP code 08544?

08544 is in Princeton, New Jersey, in Mercer County, part of the Trenton-Princeton, NJ metropolitan area. Its published point location is 40.3465, -74.6578.

What county is 08544 in?

08544 lies in Mercer County.

What area code is 08544?

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

What time zone is 08544 in?

08544 uses America/New_York.

How many people live in 08544?

About 4,392 people live in ZIP code 08544, in 12 households, at 26,457.8 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 08544?

The closest are 08541 (0.2 mi), 08542 (0.6 mi), 08540 (1.3 mi), 08528 (3.5 mi) and 08553 (3.9 mi).

Is 08544 a PO Box ZIP code?

08544 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “08544 ZIP Code — Princeton, New Jersey (Mercer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/08544

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