Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/91221

91221

ZIP 91221 is in Glendale, California, in Los Angeles County; area codes 818 and 747; Pacific time. Glendale has 14 ZIP codes in all.

Type
No street area
Time zone
America/Los_Angeles
County
Los Angeles
Coordinates
34.1425, -118.2551

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 91204, whose figures describe that area — not this ZIP code.

☼ Live from 91221 — Glendale, CA

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Where 91221 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 91221
  • 🔢 Type 91221 into a pocket calculator and turn it upside down: IZZIG — not quite a word, sorry.
  • ➕ As a number, 91,221 = 3 × 13 × 2339. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110010001010101
  • 🏠 Its numerical neighbours: 91214 (La Crescenta, CA, 6 mi away) and 91222 (Glendale, CA, 0 mi away).
  • 🔄 Backwards, 91221 becomes 12219, which is not a ZIP code at all.
  • 👥 16 other ZIP codes are made of exactly the same digits (11229, 12192, 12912, 12921, 19122, 21219, …). The farthest-flung twin is 12921 in Chazy, NY, 2,467 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 92%.
  • 🎯1,152 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91221 and you would come out at 34.14°S, 61.74°E — 993 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 52m.
🌙 The sky over 91221 today
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Source: USGS.

Business and tax activity

Business establishments3This ZIP3
Employees6This ZIP6
Annual payroll$413,000This ZIP$413,000

Land area

ZIP codes near 91221

ZIPCityDistance
91209 Glendale, CA 0.0 mi
91222 Glendale, CA 0.0 mi
91225 Glendale, CA 0.0 mi
91226 Glendale, CA 0.0 mi
91210 Glendale, CA 0.2 mi
91204 Glendale, CA 0.6 mi
91205 Glendale, CA 0.7 mi
91203 Glendale, CA 0.9 mi
91207 Glendale, CA 1.9 mi
90039 Los Angeles, CA 2.1 mi

Find every ZIP code within 10 miles of 91221 →

Questions about this ZIP code

Where is ZIP code 91221?

91221 is in Glendale, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.1425, -118.2551.

What county is 91221 in?

91221 lies in Los Angeles County.

What area code is 91221?

Glendale uses area codes 818 and 747, from NANPA's telephone records.

What time zone is 91221 in?

91221 uses America/Los_Angeles.

What ZIP codes are near 91221?

The closest are 91209 (0 mi), 91222 (0 mi), 91225 (0 mi), 91226 (0 mi) and 91210 (0.2 mi).

Is 91221 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. “91221 ZIP Code — Glendale, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91221

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/91221.json

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