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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/01541

01541

ZIP 01541 is Princeton, Massachusetts, in Worcester County; area codes 978 and 351; Eastern time.

Type
Standard
Time zone
America/New_York
County
Worcester
Metro area
Worcester, MA
Population
3,529
Coordinates
42.4541, -71.8775
☼ Live from 01541 — Princeton, MA

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Where 01541 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 01541
  • 🔢 Type 01541 into a pocket calculator and turn it upside down: IhSIO — not quite a word, sorry.
  • ➕ As a number, 1,541 = 23 × 67. Its digits add up to 11, a total 714 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000000101
  • 🏠 Its numerical neighbours: 01540 (Oxford, MA, 24 mi away) and 01542 (Rochdale, MA, 17 mi away).
  • 🔄 Backwards, 01541 becomes 14510 — and that is a real ZIP code: Mount Morris, NY, 305 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (01451, 05141, 10154, 10451, 10514, 10541, …). The farthest-flung twin is 51104 in Sioux City, IA, 1,245 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther east than 95%.
  • 🎯1,395 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01541 and you would come out at 42.45°S, 108.12°E — 840 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 04m.
  • 📏 At 35.4 square miles of land, 01541 is bigger than 50% of ZIP codes — room for about 27 Central Parks.
🌙 The sky over 01541 today
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🌋 Shake report
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Source: USGS.

People and housing

Population3,529This ZIP3,529
Households1,330This ZIP1,330
Housing units1,417This ZIP1,417
Median age46.1This ZIP46.1Massachusetts40.0US 38.9
Median household income$158,750This ZIP$158,750Massachusetts$103,960US $80,734
Median home value$520,500This ZIP$520,500Massachusetts$562,100US $332,700
Median gross rent$897This ZIP$897Massachusetts$1,762US $1,413
Bachelor's degree or higher59.4%This ZIP59.4%
Mean commute36.5 minThis ZIP36.5 min
Population density99.6 / sq miThis ZIP99.6 / sq mi

Business and tax activity

Business establishments74This ZIP74
Employees1,085This ZIP1,085
Annual payroll$26,331,000This ZIP$26,331,000
Tax returns filed1,880This ZIP1,880
Total adjusted gross income$266,128,000This ZIP$266,128,000

Land area

Land area35.43 sq miThis ZIP35.43 sq mi
Water area0.40 sq miThis ZIP0.40 sq mi

ZIP codes near 01541

ZIPCityDistance
01564 Sterling, MA 5.2 mi
01522 Jefferson, MA 5.4 mi
01546 Shrewsbury, MA 6.3 mi
01653 Worcester, MA 6.3 mi
01655 Worcester, MA 6.3 mi
01543 Rutland, MA 6.5 mi
01441 Westminster, MA 6.6 mi
01452 Hubbardston, MA 7.0 mi
01583 West Boylston, MA 7.1 mi
01473 Westminster, MA 7.1 mi

Find every ZIP code within 10 miles of 01541 →

Questions about this ZIP code

Where is ZIP code 01541?

01541 is in Princeton, Massachusetts, in Worcester County, part of the Worcester, MA metropolitan area. Its published point location is 42.4541, -71.8775.

What county is 01541 in?

01541 lies in Worcester County.

What area code is 01541?

Princeton uses area codes 978 and 351, from NANPA's telephone records.

What time zone is 01541 in?

01541 uses America/New_York.

How many people live in 01541?

About 3,529 people live in ZIP code 01541, in 1,330 households, at 99.6 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 01541?

$158,750 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01541?

The closest are 01564 (5.2 mi), 01522 (5.4 mi), 01546 (6.3 mi), 01653 (6.3 mi) and 01655 (6.3 mi).

Is 01541 a PO Box ZIP code?

01541 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “01541 ZIP Code — Princeton, Massachusetts (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01541

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