Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/01451

01451

ZIP 01451 is Harvard, Massachusetts, in Worcester County; area codes 351 and 978; Eastern time.

Type
Standard
Time zone
America/New_York
County
Worcester
Metro area
Worcester, MA
Population
5,487
Coordinates
42.5019, -71.5682
☼ Live from 01451 — Harvard, MA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 01451 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 01451
  • 🔢 Type 01451 into a pocket calculator and turn it upside down: IShIO — not quite a word, sorry.
  • ➕ 01451 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 11, a total 714 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110101011
  • 🏠 Its numerical neighbours: 01450 (Groton, MA, 8 mi away) and 01452 (Hubbardston, MA, 22 mi away).
  • 🔄 Backwards, 01451 becomes 15410 — and that is a real ZIP code: Adah, PA, 469 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (01541, 05141, 10154, 10451, 10514, 10541, …). The farthest-flung twin is 51104 in Sioux City, IA, 1,260 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther east than 95%.
  • 🎯1,411 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01451 and you would come out at 42.50°S, 108.43°E — 835 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 03m.
  • 📏 At 21.0 square miles of land, 01451 is bigger than 38% of ZIP codes — room for about 16 Central Parks.
🌙 The sky over 01451 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population5,487This ZIP5,487
Households1,900This ZIP1,900
Housing units2,042This ZIP2,042
Median age41.8This ZIP41.8Massachusetts40.0US 38.9
Median household income$214,792This ZIP$214,792Massachusetts$103,960US $80,734
Median home value$856,200This ZIP$856,200Massachusetts$562,100US $332,700
Median gross rent$1,250This ZIP$1,250Massachusetts$1,762US $1,413
Bachelor's degree or higher77.8%This ZIP77.8%
Mean commute31.4 minThis ZIP31.4 min
Population density260.7 / sq miThis ZIP260.7 / sq mi

Business and tax activity

Business establishments148This ZIP148
Employees810This ZIP810
Annual payroll$57,562,000This ZIP$57,562,000
Tax returns filed2,670This ZIP2,670
Total adjusted gross income$629,349,000This ZIP$629,349,000

Land area

Land area21.05 sq miThis ZIP21.05 sq mi
Water area0.63 sq miThis ZIP0.63 sq mi

ZIP codes near 01451

ZIPCityDistance
01467 Still River, MA 2.5 mi
01719 Boxborough, MA 2.6 mi
01434 Devens, MA 3.1 mi
01432 Ayer, MA 4.5 mi
01460 Littleton, MA 4.6 mi
01740 Bolton, MA 4.6 mi
01523 Lancaster, MA 5.6 mi
01775 Stow, MA 5.7 mi
01464 Shirley, MA 6.2 mi
01720 Acton, MA 6.7 mi

Find every ZIP code within 10 miles of 01451 →

Questions about this ZIP code

Where is ZIP code 01451?

01451 is in Harvard, Massachusetts, in Worcester County, part of the Worcester, MA metropolitan area. Its published point location is 42.5019, -71.5682.

What county is 01451 in?

01451 lies in Worcester County.

What area code is 01451?

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

What time zone is 01451 in?

01451 uses America/New_York.

How many people live in 01451?

About 5,487 people live in ZIP code 01451, in 1,900 households, at 260.7 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 01451?

$214,792 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01451?

The closest are 01467 (2.5 mi), 01719 (2.6 mi), 01434 (3.1 mi), 01432 (4.5 mi) and 01460 (4.6 mi).

Is 01451 a PO Box ZIP code?

01451 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “01451 ZIP Code — Harvard, Massachusetts (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01451

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/01451.json

Underlying data is public domain or openly licensed — sources, vintages and licences.