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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/01531

01531

ZIP 01531 is New Braintree, Massachusetts, in Worcester County; Eastern time.

Type
Standard
Time zone
America/New_York
County
Worcester
Metro area
Worcester, MA
Population
973
Coordinates
42.3262, -72.1334
☼ Live from 01531 — New Braintree, MA

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Local time: —

Where 01531 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 01531
  • 🔢 Type 01531 into a pocket calculator and turn it upside down: IESIO — not quite a word, sorry.
  • ➕ 01531 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111111011
  • 🏠 Its numerical neighbours: 01529 (Millville, MA, 35 mi away) and 01532 (Northborough, MA, 25 mi away).
  • 🔄 Backwards, 01531 becomes 13510, which is not a ZIP code at all.
  • 👥 26 other ZIP codes are made of exactly the same digits (01351, 10153, 11053, 11530, 13051, 13501, …). The farthest-flung twin is 51103 in Sioux City, IA, 1,236 miles away.
  • 🧭 Farther north than 78% of all ZIP codes, and farther east than 94%.
  • 🎯1,383 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01531 and you would come out at 42.33°S, 107.87°E — 840 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 05m.
  • 📏 At 20.8 square miles of land, 01531 is bigger than 38% of ZIP codes — room for about 16 Central Parks.
🌙 The sky over 01531 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population973This ZIP973
Households382This ZIP382
Housing units404This ZIP404
Median age47.8This ZIP47.8Massachusetts40.0US 38.9
Median household income$99,500This ZIP$99,500Massachusetts$103,960US $80,734
Median home value$408,800This ZIP$408,800Massachusetts$562,100US $332,700
Median gross rent$1,484This ZIP$1,484Massachusetts$1,762US $1,413
Bachelor's degree or higher41.4%This ZIP41.4%
Mean commute36.8 minThis ZIP36.8 min
Population density46.9 / sq miThis ZIP46.9 / sq mi

Business and tax activity

Business establishments18This ZIP18
Employees50This ZIP50
Annual payroll$2,507,000This ZIP$2,507,000
Tax returns filed510This ZIP510
Total adjusted gross income$42,171,000This ZIP$42,171,000

Land area

Land area20.76 sq miThis ZIP20.76 sq mi
Water area0.16 sq miThis ZIP0.16 sq mi

ZIP codes near 01531

ZIPCityDistance
01031 Gilbertville, MA 3.0 mi
01094 Wheelwright, MA 3.0 mi
01074 South Barre, MA 4.1 mi
01068 Oakham, MA 4.2 mi
01037 Hardwick, MA 4.7 mi
01535 North Brookfield, MA 5.3 mi
01585 West Brookfield, MA 6.3 mi
01005 Barre, MA 6.5 mi
01082 Ware, MA 7.7 mi
01083 Warren, MA 8.9 mi

Find every ZIP code within 10 miles of 01531 →

Questions about this ZIP code

Where is ZIP code 01531?

01531 is in New Braintree, Massachusetts, in Worcester County, part of the Worcester, MA metropolitan area. Its published point location is 42.3262, -72.1334.

What county is 01531 in?

01531 lies in Worcester County.

What time zone is 01531 in?

01531 uses America/New_York.

How many people live in 01531?

About 973 people live in ZIP code 01531, in 382 households, at 46.9 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 01531?

$99,500 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01531?

The closest are 01031 (3 mi), 01094 (3 mi), 01074 (4.1 mi), 01068 (4.2 mi) and 01037 (4.7 mi).

Is 01531 a PO Box ZIP code?

01531 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “01531 ZIP Code — New Braintree, Massachusetts (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01531

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