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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/02420

02420

ZIP 02420 is in Lexington, Massachusetts, in Middlesex County; area codes 781 and 339; Eastern time. Lexington has 2 ZIP codes; the other is 02421.

Type
Standard
Time zone
America/New_York
County
Middlesex
Population
16,215
Coordinates
42.4591, -71.2177
☼ Live from 02420 — Lexington, MA

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Where 02420 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 02420
  • 🔢 Type 02420 into a pocket calculator and turn it upside down: OZhZO — not quite a word, sorry.
  • ⇆02420 reads the same backwards. It is one of only 412 palindromic ZIP codes.
  • ➕ As a number, 2,420 = 2 × 2 × 5 × 11 × 11. Its digits add up to 8, a total 251 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100101110100
  • 🏠 Its numerical neighbours: 02382 (Whitman, MA, 30 mi away) and 02421 (Lexington, MA, 2 mi away).
  • 👥 17 other ZIP codes are made of exactly the same digits (02204, 04022, 04220, 20024, 20042, 20204, …). The farthest-flung twin is 42002 in Paducah, KY, 998 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther east than 96%.
  • 🎯1,429 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 02420 and you would come out at 42.46°S, 108.78°E — 823 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 04m.
  • 📏 At 7.0 square miles of land, 02420 is bigger than 23% of ZIP codes — room for about 5.3 Central Parks.
🌙 The sky over 02420 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population16,215This ZIP16,215
Households5,653This ZIP5,653
Housing units5,851This ZIP5,851
Median age45.9This ZIP45.9Massachusetts40.0US 38.9
Median household income$245,031This ZIP$245,031Massachusetts$103,960US $80,734
Median home value$1,200,300This ZIP$1,200,300Massachusetts$562,100US $332,700
Median gross rent$2,801This ZIP$2,801Massachusetts$1,762US $1,413
Bachelor's degree or higher85.6%This ZIP85.6%
Mean commute30.1 minThis ZIP30.1 min
Population density2,303.9 / sq miThis ZIP2,303.9 / sq mi

Business and tax activity

Business establishments504This ZIP504
Employees4,413This ZIP4,413
Annual payroll$281,214,000This ZIP$281,214,000
Tax returns filed7,170This ZIP7,170
Total adjusted gross income$2,530,255,000This ZIP$2,530,255,000

Land area

Land area7.04 sq miThis ZIP7.04 sq mi
Water area0.05 sq miThis ZIP0.05 sq mi

Other place names in 02420

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

ZIP codes near 02420

ZIPCityDistance
02421 Lexington, MA 1.8 mi
01803 Burlington, MA 3.2 mi
02475 Arlington Heights, MA 3.3 mi
01805 Burlington, MA 3.4 mi
01731 Hanscom Afb, MA 3.4 mi
01813 Woburn, MA 3.6 mi
01815 Woburn, MA 3.6 mi
01888 Woburn, MA 3.6 mi
02476 Arlington, MA 3.7 mi
01890 Winchester, MA 3.8 mi

Find every ZIP code within 10 miles of 02420 →

Questions about this ZIP code

Where is ZIP code 02420?

02420 is in Lexington, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.4591, -71.2177.

What county is 02420 in?

02420 lies in Middlesex County.

What area code is 02420?

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

What time zone is 02420 in?

02420 uses America/New_York.

How many people live in 02420?

About 16,215 people live in ZIP code 02420, in 5,653 households, at 2,303.9 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 02420?

$245,031 a year, against $103,960 across Massachusetts.

What ZIP codes are near 02420?

The closest are 02421 (1.8 mi), 01803 (3.2 mi), 02475 (3.3 mi), 01805 (3.4 mi) and 01731 (3.4 mi).

Is 02420 a PO Box ZIP code?

02420 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “02420 ZIP Code — Lexington, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/02420

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