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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/91321

91321

ZIP 91321 is in Newhall, California, in Los Angeles County; Pacific time. Newhall has 2 ZIP codes; the other is 91322.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
31,989
Coordinates
34.3637, -118.4870
☼ Live from 91321 — Newhall, CA

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NEXRAD radar
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Local time: —

Where 91321 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 91321
  • 🔢 Type 91321 into a pocket calculator and turn it upside down: IZEIG — not quite a word, sorry.
  • ➕ As a number, 91,321 = 29 × 47 × 67. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110010010111001
  • 🏠 Its numerical neighbours: 91320 (Newbury Park, CA, 29 mi away) and 91322 (Newhall, CA, 3 mi away).
  • 🔄 Backwards, 91321 becomes 12319, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (11239, 11932, 12139, 12193, 12913, 13219, …). The farthest-flung twin is 11932 in Bridgehampton, NY, 2,537 miles away.
  • 🧭 Farther south than 77% of all ZIP codes, and farther west than 92%.
  • 🎯1,157 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91321 and you would come out at 34.36°S, 61.51°E — 1,002 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 27m of daylight. Shortest: 9h 51m.
  • 📏 At 26.7 square miles of land, 91321 is bigger than 43% of ZIP codes — room for about 20 Central Parks.
🌙 The sky over 91321 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population31,989This ZIP31,989
Households10,863This ZIP10,863
Housing units11,338This ZIP11,338
Median age36.5This ZIP36.5California37.9US 38.9
Median household income$91,092This ZIP$91,092California$99,122US $80,734
Median home value$691,600This ZIP$691,600California$734,700US $332,700
Median gross rent$2,134This ZIP$2,134California$2,036US $1,413
Bachelor's degree or higher32.4%This ZIP32.4%
Mean commute30.5 minThis ZIP30.5 min
Population density1,199.9 / sq miThis ZIP1,199.9 / sq mi

Business and tax activity

Business establishments882This ZIP882
Employees9,863This ZIP9,863
Annual payroll$423,785,000This ZIP$423,785,000
Tax returns filed15,540This ZIP15,540
Total adjusted gross income$1,236,990,000This ZIP$1,236,990,000

Land area

Land area26.66 sq miThis ZIP26.66 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 91321

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

ZIP codes near 91321

ZIPCityDistance
91322 Newhall, CA 2.9 mi
91380 Santa Clarita, CA 3.7 mi
91382 Santa Clarita, CA 3.7 mi
91383 Santa Clarita, CA 3.7 mi
91386 Canyon Country, CA 4.2 mi
91392 Sylmar, CA 4.4 mi
91350 Santa Clarita, CA 4.7 mi
91351 Canyon Country, CA 5.1 mi
91344 Granada Hills, CA 5.2 mi
91355 Valencia, CA 5.4 mi

Find every ZIP code within 10 miles of 91321 →

Questions about this ZIP code

Where is ZIP code 91321?

91321 is in Newhall, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.3637, -118.4870.

What county is 91321 in?

91321 lies in Los Angeles County.

What time zone is 91321 in?

91321 uses America/Los_Angeles.

How many people live in 91321?

About 31,989 people live in ZIP code 91321, in 10,863 households, at 1,199.9 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 91321?

$91,092 a year, against $99,122 across California.

What ZIP codes are near 91321?

The closest are 91322 (2.9 mi), 91380 (3.7 mi), 91382 (3.7 mi), 91383 (3.7 mi) and 91386 (4.2 mi).

Is 91321 a PO Box ZIP code?

91321 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91321 ZIP Code — Newhall, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91321

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