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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/02140

02140

ZIP 02140 is in Cambridge, Massachusetts, in Middlesex County; area codes 617 and 857; Eastern time. Cambridge has 6 ZIP codes; the others are 02138, 02139, 02141, 02142 and 02238.

Type
Standard
Time zone
America/New_York
County
Middlesex
Population
21,204
Coordinates
42.3922, -71.1340
☼ Live from 02140 — Cambridge, MA

Weather right now

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Local time: —

Where 02140 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 02140
  • 🔢 Type 02140 into a pocket calculator and turn it upside down: OhIZO — not quite a word, sorry.
  • ➕ As a number, 2,140 = 2 × 2 × 5 × 107. Its digits add up to 7, a total 150 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100001011100
  • 🏠 Its numerical neighbours: 02139 (Cambridge, MA, 3 mi away) and 02141 (Cambridge, MA, 3 mi away).
  • 🔄 Backwards, 02140 becomes 04120, which is not a ZIP code at all.
  • 👥 22 other ZIP codes are made of exactly the same digits (01240, 01420, 02041, 04021, 04102, 04210, …). The farthest-flung twin is 42001 in Paducah, KY, 1,003 miles away.
  • 🧭 Farther north than 78% of all ZIP codes, and farther east than 96%.
  • 🎯1,433 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 02140 and you would come out at 42.39°S, 108.87°E — 817 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 04m.
  • 📏 At 1.2 square miles of land, 02140 is bigger than 9% of ZIP codes — about 560 football fields.
🌙 The sky over 02140 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population21,204This ZIP21,204
Households9,944This ZIP9,944
Housing units11,066This ZIP11,066
Median age33.9This ZIP33.9Massachusetts40.0US 38.9
Median household income$135,286This ZIP$135,286Massachusetts$103,960US $80,734
Median home value$1,149,800This ZIP$1,149,800Massachusetts$562,100US $332,700
Median gross rent$2,615This ZIP$2,615Massachusetts$1,762US $1,413
Bachelor's degree or higher79.1%This ZIP79.1%
Mean commute31.9 minThis ZIP31.9 min
Population density18,310.9 / sq miThis ZIP18,310.9 / sq mi

Business and tax activity

Business establishments522This ZIP522
Employees9,129This ZIP9,129
Annual payroll$1,014,848,000This ZIP$1,014,848,000
Tax returns filed11,070This ZIP11,070
Total adjusted gross income$1,624,077,000This ZIP$1,624,077,000

Land area

Land area1.16 sq miThis ZIP1.16 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 02140

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

ZIP codes near 02140

ZIPCityDistance
02144 Somerville, MA 0.8 mi
02138 Cambridge, MA 0.9 mi
02163 Boston, MA 1.8 mi
02238 Cambridge, MA 1.9 mi
02143 Somerville, MA 2.0 mi
02156 West Medford, MA 2.1 mi
02145 Somerville, MA 2.3 mi
02474 Arlington, MA 2.3 mi
02153 Medford, MA 2.3 mi
02134 Allston, MA 2.3 mi

Find every ZIP code within 10 miles of 02140 →

Questions about this ZIP code

Where is ZIP code 02140?

02140 is in Cambridge, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.3922, -71.1340.

What county is 02140 in?

02140 lies in Middlesex County.

What area code is 02140?

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

What time zone is 02140 in?

02140 uses America/New_York.

How many people live in 02140?

About 21,204 people live in ZIP code 02140, in 9,944 households, at 18,310.9 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 02140?

$135,286 a year, against $103,960 across Massachusetts.

What ZIP codes are near 02140?

The closest are 02144 (0.8 mi), 02138 (0.9 mi), 02163 (1.8 mi), 02238 (1.9 mi) and 02143 (2 mi).

Is 02140 a PO Box ZIP code?

02140 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “02140 ZIP Code — Cambridge, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/02140

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