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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/01520

01520

ZIP 01520 is Holden, 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
16,912
Coordinates
42.3342, -71.8543
☼ Live from 01520 — Holden, MA

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Where 01520 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 01520
  • 🔢 Type 01520 into a pocket calculator and turn it upside down: OZSIO — not quite a word, sorry.
  • ➕ As a number, 1,520 = 2 × 2 × 2 × 2 × 5 × 19. Its digits add up to 8, a total 251 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111110000
  • 🏠 Its numerical neighbours: 01519 (Grafton, MA, 13 mi away) and 01521 (Holland, MA, 26 mi away).
  • 🔄 Backwards, 01520 becomes 02510, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (02051, 02150, 05201, 10025, 10502, 10520, …). The farthest-flung twin is 51020 in Galva, IA, 1,198 miles away.
  • 🧭 Farther north than 78% of all ZIP codes, and farther east than 95%.
  • 🎯1,397 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01520 and you would come out at 42.33°S, 108.15°E — 833 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 05m.
  • 📏 At 18.8 square miles of land, 01520 is bigger than 36% of ZIP codes — room for about 14 Central Parks.
🌙 The sky over 01520 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population16,912This ZIP16,912
Households5,978This ZIP5,978
Housing units6,008This ZIP6,008
Median age41.5This ZIP41.5Massachusetts40.0US 38.9
Median household income$148,125This ZIP$148,125Massachusetts$103,960US $80,734
Median home value$478,300This ZIP$478,300Massachusetts$562,100US $332,700
Median gross rent$1,775This ZIP$1,775Massachusetts$1,762US $1,413
Bachelor's degree or higher57.5%This ZIP57.5%
Mean commute26.1 minThis ZIP26.1 min
Population density898.3 / sq miThis ZIP898.3 / sq mi

Business and tax activity

Business establishments284This ZIP284
Employees2,767This ZIP2,767
Annual payroll$135,960,000This ZIP$135,960,000
Tax returns filed8,280This ZIP8,280
Total adjusted gross income$968,022,000This ZIP$968,022,000

Land area

Land area18.83 sq miThis ZIP18.83 sq mi
Water area0.70 sq miThis ZIP0.70 sq mi

ZIP codes near 01520

ZIPCityDistance
01522 Jefferson, MA 2.9 mi
01546 Shrewsbury, MA 3.0 mi
01653 Worcester, MA 3.0 mi
01655 Worcester, MA 3.0 mi
01606 Worcester, MA 3.4 mi
01609 Worcester, MA 3.6 mi
01613 Worcester, MA 3.9 mi
01583 West Boylston, MA 4.4 mi
01602 Worcester, MA 4.5 mi
01605 Worcester, MA 4.6 mi

Find every ZIP code within 10 miles of 01520 →

Questions about this ZIP code

Where is ZIP code 01520?

01520 is in Holden, Massachusetts, in Worcester County, part of the Worcester, MA metropolitan area. Its published point location is 42.3342, -71.8543.

What county is 01520 in?

01520 lies in Worcester County.

What area code is 01520?

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

What time zone is 01520 in?

01520 uses America/New_York.

How many people live in 01520?

About 16,912 people live in ZIP code 01520, in 5,978 households, at 898.3 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 01520?

$148,125 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01520?

The closest are 01522 (2.9 mi), 01546 (3 mi), 01653 (3 mi), 01655 (3 mi) and 01606 (3.4 mi).

Is 01520 a PO Box ZIP code?

01520 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “01520 ZIP Code — Holden, Massachusetts (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01520

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