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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/02143

02143

ZIP 02143 is in Somerville, Massachusetts, in Middlesex County; area codes 617 and 857; Eastern time. Somerville has 3 ZIP codes; the others are 02144 and 02145.

Type
Standard
Time zone
America/New_York
County
Middlesex
Population
25,513
Coordinates
42.3814, -71.0967
☼ Live from 02143 — Somerville, MA

Weather right now

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Local time: —

Where 02143 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 02143
  • 🔢 Type 02143 into a pocket calculator and turn it upside down: EhIZO — not quite a word, sorry.
  • ➕ 02143 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100001011111
  • 🏠 Its numerical neighbours: 02142 (Cambridge, MA, 2 mi away) and 02144 (Somerville, MA, 2 mi away).
  • 🔄 Backwards, 02143 becomes 34120 — and that is a real ZIP code: Naples, FL, 1,259 miles away.
  • 👥 68 other ZIP codes are made of exactly the same digits (01243, 01342, 01432, 02134, 02341, 03241, …). The farthest-flung twin is 34021 in APO AA, a military post office, 2,280 miles away.
  • 🧭 Farther north than 78% of all ZIP codes, and farther east than 96%.
  • 🎯1,435 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 02143 and you would come out at 42.38°S, 108.90°E — 815 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 04m.
  • 📏 At 1.5 square miles of land, 02143 is bigger than 10% of ZIP codes — room for about 1.2 Central Parks.
🌙 The sky over 02143 today
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🌋 Shake report
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Source: USGS.

People and housing

Population25,513This ZIP25,513
Households12,283This ZIP12,283
Housing units13,050This ZIP13,050
Median age32.1This ZIP32.1Massachusetts40.0US 38.9
Median household income$130,753This ZIP$130,753Massachusetts$103,960US $80,734
Median home value$926,800This ZIP$926,800Massachusetts$562,100US $332,700
Median gross rent$2,475This ZIP$2,475Massachusetts$1,762US $1,413
Bachelor's degree or higher75.9%This ZIP75.9%
Mean commute29.4 minThis ZIP29.4 min
Population density16,524.0 / sq miThis ZIP16,524.0 / sq mi

Business and tax activity

Business establishments679This ZIP679
Employees11,442This ZIP11,442
Annual payroll$833,238,000This ZIP$833,238,000
Tax returns filed14,860This ZIP14,860
Total adjusted gross income$1,611,954,000This ZIP$1,611,954,000

Land area

Land area1.54 sq miThis ZIP1.54 sq mi
Water area0.00 sq mi

Other place names in 02143

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

ZIP codes near 02143

ZIPCityDistance
02238 Cambridge, MA 0.6 mi
02145 Somerville, MA 0.8 mi
02141 Cambridge, MA 1.1 mi
02139 Cambridge, MA 1.3 mi
02142 Cambridge, MA 1.5 mi
02163 Boston, MA 1.7 mi
02129 Charlestown, MA 1.8 mi
02144 Somerville, MA 1.9 mi
02114 Boston, MA 2.0 mi
02138 Cambridge, MA 2.0 mi

Find every ZIP code within 10 miles of 02143 →

Questions about this ZIP code

Where is ZIP code 02143?

02143 is in Somerville, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.3814, -71.0967.

What county is 02143 in?

02143 lies in Middlesex County.

What area code is 02143?

Somerville uses area codes 617 and 857, from NANPA's telephone records.

What time zone is 02143 in?

02143 uses America/New_York.

How many people live in 02143?

About 25,513 people live in ZIP code 02143, in 12,283 households, at 16,524.0 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 02143?

$130,753 a year, against $103,960 across Massachusetts.

What ZIP codes are near 02143?

The closest are 02238 (0.6 mi), 02145 (0.8 mi), 02141 (1.1 mi), 02139 (1.3 mi) and 02142 (1.5 mi).

Is 02143 a PO Box ZIP code?

02143 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “02143 ZIP Code — Somerville, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/02143

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