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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/01550

01550

ZIP 01550 is Southbridge, Massachusetts, in Worcester County; area codes 774 and 508; Eastern time.

Type
Standard
Time zone
America/New_York
County
Worcester
Metro area
Worcester, MA
Population
17,928
Coordinates
42.0597, -72.0339
☼ Live from 01550 — Southbridge, MA

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Where 01550 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 01550
  • 🔢 Type 01550 into a pocket calculator and turn it upside down: OSSIO — not quite a word, sorry.
  • ➕ As a number, 1,550 = 2 × 5 × 5 × 31. Its digits add up to 11, a total 714 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000001110
  • 🏠 Its numerical neighbours: 01546 (Shrewsbury, MA, 22 mi away) and 01560 (South Grafton, MA, 20 mi away).
  • 🔄 Backwards, 01550 becomes 05510, which is not a ZIP code at all.
  • 👥 18 other ZIP codes are made of exactly the same digits (01505, 05051, 05150, 05501, 10055, 10505, …). The farthest-flung twin is 51050 in Remsen, IA, 1,217 miles away.
  • 🧭 Farther north than 76% of all ZIP codes, and farther east than 95%.
  • 🎯1,388 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01550 and you would come out at 42.06°S, 107.97°E — 822 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 15m of daylight. Shortest: 9h 06m.
  • 📏 At 20.2 square miles of land, 01550 is bigger than 38% of ZIP codes — room for about 15 Central Parks.
🌙 The sky over 01550 today
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🌋 Shake report
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Source: USGS.

People and housing

Population17,928This ZIP17,928
Households7,260This ZIP7,260
Housing units7,599This ZIP7,599
Median age40.9This ZIP40.9Massachusetts40.0US 38.9
Median household income$66,287This ZIP$66,287Massachusetts$103,960US $80,734
Median home value$294,800This ZIP$294,800Massachusetts$562,100US $332,700
Median gross rent$1,256This ZIP$1,256Massachusetts$1,762US $1,413
Bachelor's degree or higher19.4%This ZIP19.4%
Mean commute28.3 minThis ZIP28.3 min
Population density885.9 / sq miThis ZIP885.9 / sq mi

Business and tax activity

Business establishments326This ZIP326
Employees5,221This ZIP5,221
Annual payroll$279,823,000This ZIP$279,823,000
Tax returns filed8,610This ZIP8,610
Total adjusted gross income$475,329,000This ZIP$475,329,000

Land area

Land area20.24 sq miThis ZIP20.24 sq mi
Water area0.62 sq miThis ZIP0.62 sq mi

Other place names in 01550

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

ZIP codes near 01550

ZIPCityDistance
01566 Sturbridge, MA 3.8 mi
01571 Dudley, MA 5.1 mi
06262 Quinebaug, CT 5.2 mi
01518 Fiskdale, MA 5.3 mi
06245 Fabyan, CT 5.5 mi
06244 East Woodstock, CT 5.9 mi
06281 Woodstock, CT 6.0 mi
01507 Charlton, MA 6.1 mi
01508 Charlton City, MA 6.4 mi
01521 Holland, MA 7.6 mi

Find every ZIP code within 10 miles of 01550 →

Questions about this ZIP code

Where is ZIP code 01550?

01550 is in Southbridge, Massachusetts, in Worcester County, part of the Worcester, MA metropolitan area. Its published point location is 42.0597, -72.0339.

What county is 01550 in?

01550 lies in Worcester County.

What area code is 01550?

Southbridge uses area codes 774 and 508, from NANPA's telephone records.

What time zone is 01550 in?

01550 uses America/New_York.

How many people live in 01550?

About 17,928 people live in ZIP code 01550, in 7,260 households, at 885.9 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 01550?

$66,287 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01550?

The closest are 01566 (3.8 mi), 01571 (5.1 mi), 06262 (5.2 mi), 01518 (5.3 mi) and 06245 (5.5 mi).

Is 01550 a PO Box ZIP code?

01550 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “01550 ZIP Code — Southbridge, Massachusetts (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01550

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