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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/90661

90661

ZIP 90661 is in Pico Rivera, California, in Los Angeles County; area code 562; Pacific time. Pico Rivera has 3 ZIP codes; the others are 90660 and 90662.

Type
No street area
Time zone
America/Los_Angeles
County
Los Angeles
Coordinates
33.9831, -118.0967

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 90660, whose figures describe that area — not this ZIP code.

☼ Live from 90661 — Pico Rivera, CA

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Where 90661 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 90661
  • 🔢 Type 90661 into a pocket calculator and turn it upside down: IggOG — not quite a word, sorry.
  • ➕ As a number, 90,661 = 17 × 5333. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110001000100101
  • 🏠 Its numerical neighbours: 90660 (Pico Rivera, CA, 1 mi away) and 90662 (Pico Rivera, CA, 0 mi away).
  • 🔄 Backwards, 90661 becomes 16609, which is not a ZIP code at all.
  • 👥 19 other ZIP codes are made of exactly the same digits (01966, 09166, 19066, 19606, 60169, 60196, …). The farthest-flung twin is 09166 in APO AE, a military post office, 5,806 miles away.
  • 🧭 Farther south than 79% of all ZIP codes, and farther west than 91%.
  • 🎯1,148 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 90661 and you would come out at 33.98°S, 61.90°E — 987 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 25m of daylight. Shortest: 9h 53m.
🌙 The sky over 90661 today
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Source: USGS.

Land area

ZIP codes near 90661

ZIPCityDistance
90662 Pico Rivera, CA 0.0 mi
90660 Pico Rivera, CA 0.6 mi
90606 Whittier, CA 1.8 mi
90240 Downey, CA 2.3 mi
90640 Montebello, CA 2.4 mi
90671 Santa Fe Springs, CA 2.6 mi
90040 Los Angeles, CA 3.2 mi
90241 Downey, CA 3.5 mi
90239 Downey, CA 3.6 mi
90607 Whittier, CA 3.7 mi

Find every ZIP code within 10 miles of 90661 →

Questions about this ZIP code

Where is ZIP code 90661?

90661 is in Pico Rivera, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 33.9831, -118.0967.

What county is 90661 in?

90661 lies in Los Angeles County.

What area code is 90661?

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

What time zone is 90661 in?

90661 uses America/Los_Angeles.

What ZIP codes are near 90661?

The closest are 90662 (0 mi), 90660 (0.6 mi), 90606 (1.8 mi), 90240 (2.3 mi) and 90640 (2.4 mi).

Is 90661 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “90661 ZIP Code — Pico Rivera, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/90661

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/90661.json

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