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/01803

01803

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

Type
Standard
Time zone
America/New_York
County
Middlesex
Population
26,274
Coordinates
42.5032, -71.2017
☼ Live from 01803 — Burlington, MA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 01803 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 01803
  • 🔢 Type 01803 into a pocket calculator and turn it upside down: EOBIO — not quite a word, sorry.
  • ➕ As a number, 1,803 = 3 × 601. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11100001011
  • 🏠 Its numerical neighbours: 01801 (Woburn, MA, 3 mi away) and 01805 (Burlington, MA, 0 mi away).
  • 🔄 Backwards, 01803 becomes 30810 — and that is a real ZIP code: Gibson, GA, 891 miles away.
  • 👥 34 other ZIP codes are made of exactly the same digits (00831, 01038, 01083, 01380, 01830, 03108, …). The farthest-flung twin is 83001 in Jackson, WY, 1,976 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 01803 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.
  • 📏 At 11.3 square miles of land, 01803 is bigger than 29% of ZIP codes — room for about 8.6 Central Parks.
🌙 The sky over 01803 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population26,274This ZIP26,274
Households9,974This ZIP9,974
Housing units10,371This ZIP10,371
Median age45.9This ZIP45.9Massachusetts40.0US 38.9
Median household income$146,436This ZIP$146,436Massachusetts$103,960US $80,734
Median home value$740,600This ZIP$740,600Massachusetts$562,100US $332,700
Median gross rent$2,718This ZIP$2,718Massachusetts$1,762US $1,413
Bachelor's degree or higher58.4%This ZIP58.4%
Mean commute27.5 minThis ZIP27.5 min
Population density2,330.9 / sq miThis ZIP2,330.9 / sq mi

Business and tax activity

Business establishments1,480This ZIP1,480
Employees40,471This ZIP40,471
Annual payroll$5,170,234,000This ZIP$5,170,234,000
Tax returns filed13,640This ZIP13,640
Total adjusted gross income$1,785,293,000This ZIP$1,785,293,000

Land area

Land area11.27 sq miThis ZIP11.27 sq mi
Water area0.11 sq miThis ZIP0.11 sq mi

Other place names in 01803

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

ZIP codes near 01803

ZIPCityDistance
01805 Burlington, MA 0.3 mi
01866 Pinehurst, MA 2.2 mi
01801 Woburn, MA 2.6 mi
01813 Woburn, MA 3.0 mi
01815 Woburn, MA 3.0 mi
01888 Woburn, MA 3.0 mi
02420 Lexington, MA 3.2 mi
01821 Billerica, MA 4.1 mi
01730 Bedford, MA 4.1 mi
01865 Nutting Lake, MA 4.2 mi

Find every ZIP code within 10 miles of 01803 →

Questions about this ZIP code

Where is ZIP code 01803?

01803 is in Burlington, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.5032, -71.2017.

What county is 01803 in?

01803 lies in Middlesex County.

What area code is 01803?

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

What time zone is 01803 in?

01803 uses America/New_York.

How many people live in 01803?

About 26,274 people live in ZIP code 01803, in 9,974 households, at 2,330.9 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 01803?

$146,436 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01803?

The closest are 01805 (0.3 mi), 01866 (2.2 mi), 01801 (2.6 mi), 01813 (3 mi) and 01815 (3 mi).

Is 01803 a PO Box ZIP code?

01803 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “01803 ZIP Code — Burlington, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01803

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/01803.json

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