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/01805

01805

ZIP 01805 is in Burlington, Massachusetts, in Middlesex County; area codes 781 and 339; Eastern time. Burlington has 2 ZIP codes; the other is 01803.

Type
No street area
Time zone
America/New_York
County
Middlesex
Coordinates
42.5048, -71.1956

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 01803, whose figures describe that area — not this ZIP code.

☼ Live from 01805 — Burlington, MA

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Where 01805 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 01805
  • 🔢 Type 01805 into a pocket calculator and turn it upside down: SOBIO — not quite a word, sorry.
  • ➕ As a number, 1,805 = 5 × 19 × 19. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11100001101
  • 🏠 Its numerical neighbours: 01803 (Burlington, MA, 0 mi away) and 01810 (Andover, MA, 10 mi away).
  • 🔄 Backwards, 01805 becomes 50810, which is not a ZIP code at all.
  • 👥 25 other ZIP codes are made of exactly the same digits (00851, 01085, 01508, 01850, 05081, 08015, …). The farthest-flung twin is 85001 in Phoenix, AZ, 2,289 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther east than 96%.
  • 🎯1,430 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01805 and you would come out at 42.50°S, 108.80°E — 825 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 03m.
🌙 The sky over 01805 today
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Source: USGS.

Business and tax activity

Business establishments11This ZIP11
Employees4,971This ZIP4,971
Annual payroll$369,758,000This ZIP$369,758,000

Land area

ZIP codes near 01805

ZIPCityDistance
01803 Burlington, MA 0.3 mi
01866 Pinehurst, MA 2.4 mi
01801 Woburn, MA 2.4 mi
01813 Woburn, MA 2.8 mi
01815 Woburn, MA 2.8 mi
01888 Woburn, MA 2.8 mi
02420 Lexington, MA 3.4 mi
01821 Billerica, MA 4.2 mi
01865 Nutting Lake, MA 4.4 mi
01730 Bedford, MA 4.4 mi

Find every ZIP code within 10 miles of 01805 →

Questions about this ZIP code

Where is ZIP code 01805?

01805 is in Burlington, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.5048, -71.1956.

What county is 01805 in?

01805 lies in Middlesex County.

What area code is 01805?

Burlington uses area codes 781 and 339, from NANPA's telephone records.

What time zone is 01805 in?

01805 uses America/New_York.

What ZIP codes are near 01805?

The closest are 01803 (0.3 mi), 01866 (2.4 mi), 01801 (2.4 mi), 01813 (2.8 mi) and 01815 (2.8 mi).

Is 01805 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “01805 ZIP Code — Burlington, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01805

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/01805.json

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