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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/90240

90240

ZIP 90240 is in Downey, California, in Los Angeles County; area code 562; Pacific time. Downey has 4 ZIP codes; the others are 90239, 90241 and 90242.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
24,853
Coordinates
33.9557, -118.1183
☼ Live from 90240 — Downey, CA

Weather right now

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Local time: —

Where 90240 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 90240
  • 🔢 Type 90240 into a pocket calculator and turn it upside down: OhZOG — not quite a word, sorry.
  • ➕ As a number, 90,240 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 47. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110000010000000
  • 🏠 Its numerical neighbours: 90239 (Downey, CA, 1 mi away) and 90241 (Downey, CA, 1 mi away).
  • 🔄 Backwards, 90240 becomes 04209, which is not a ZIP code at all.
  • 👥 26 other ZIP codes are made of exactly the same digits (00924, 02904, 02940, 04029, 04092, 04290, …). The farthest-flung twin is 09420 in FPO AE, a military post office, 5,261 miles away.
  • 🧭 Farther south than 79% of all ZIP codes, and farther west than 91%.
  • 🎯1,150 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 90240 and you would come out at 33.96°S, 61.88°E — 985 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 25m of daylight. Shortest: 9h 53m.
  • 📏 At 3.0 square miles of land, 90240 is bigger than 14% of ZIP codes — room for about 2.3 Central Parks.
🌙 The sky over 90240 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population24,853This ZIP24,853
Households7,775This ZIP7,775
Housing units8,060This ZIP8,060
Median age38.9This ZIP38.9California37.9US 38.9
Median household income$101,904This ZIP$101,904California$99,122US $80,734
Median home value$815,600This ZIP$815,600California$734,700US $332,700
Median gross rent$1,926This ZIP$1,926California$2,036US $1,413
Bachelor's degree or higher29.3%This ZIP29.3%
Mean commute30.1 minThis ZIP30.1 min
Population density8,259.6 / sq miThis ZIP8,259.6 / sq mi

Business and tax activity

Business establishments610This ZIP610
Employees5,318This ZIP5,318
Annual payroll$193,981,000This ZIP$193,981,000
Tax returns filed12,380This ZIP12,380
Total adjusted gross income$1,063,097,000This ZIP$1,063,097,000

Land area

Land area3.01 sq miThis ZIP3.01 sq mi
Water area0.07 sq miThis ZIP0.07 sq mi

Other place names in 90240

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

ZIP codes near 90240

ZIPCityDistance
90241 Downey, CA 1.2 mi
90239 Downey, CA 1.4 mi
90671 Santa Fe Springs, CA 2.0 mi
90661 Pico Rivera, CA 2.3 mi
90662 Pico Rivera, CA 2.3 mi
90242 Downey, CA 2.7 mi
90660 Pico Rivera, CA 2.9 mi
90201 Bell Gardens, CA 3.2 mi
90040 Los Angeles, CA 3.2 mi
90606 Whittier, CA 3.3 mi

Find every ZIP code within 10 miles of 90240 →

Questions about this ZIP code

Where is ZIP code 90240?

90240 is in Downey, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 33.9557, -118.1183.

What county is 90240 in?

90240 lies in Los Angeles County.

What area code is 90240?

Downey uses area code 562, from NANPA's telephone records.

What time zone is 90240 in?

90240 uses America/Los_Angeles.

How many people live in 90240?

About 24,853 people live in ZIP code 90240, in 7,775 households, at 8,259.6 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 90240?

$101,904 a year, against $99,122 across California.

What ZIP codes are near 90240?

The closest are 90241 (1.2 mi), 90239 (1.4 mi), 90671 (2 mi), 90661 (2.3 mi) and 90662 (2.3 mi).

Is 90240 a PO Box ZIP code?

90240 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “90240 ZIP Code — Downey, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/90240

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