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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/91020

91020

ZIP 91020 is in Montrose, California, in Los Angeles County; area codes 818 and 747; Pacific time. Montrose has 2 ZIP codes; the other is 91021.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
7,532
Coordinates
34.2114, -118.2307
☼ Live from 91020 — Montrose, CA

Weather right now

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NEXRAD radar
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Local time: —

Where 91020 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 91020
  • 🔢 Type 91020 into a pocket calculator and turn it upside down: OZOIG — not quite a word, sorry.
  • ➕ As a number, 91,020 = 2 × 2 × 3 × 5 × 37 × 41. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110001110001100
  • 🏠 Its numerical neighbours: 91017 (Monrovia, CA, 14 mi away) and 91021 (Montrose, CA, 1 mi away).
  • 🔄 Backwards, 91020 becomes 02019 — and that is a real ZIP code: Bellingham, MA, 2,565 miles away.
  • 👥 34 other ZIP codes are made of exactly the same digits (00912, 00921, 01029, 01092, 01902, 02019, …). The farthest-flung twin is 09102 in APO AE, a military post office, 5,807 miles away.
  • 🧭 Farther south than 77% of all ZIP codes, and farther west than 91%.
  • 🎯1,149 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91020 and you would come out at 34.21°S, 61.77°E — 998 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 52m.
  • 📏 At 0.718 square miles of land, 91020 is bigger than 7% of ZIP codes — about 348 football fields.
🌙 The sky over 91020 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population7,532This ZIP7,532
Households3,149This ZIP3,149
Housing units3,517This ZIP3,517
Median age40.2This ZIP40.2California37.9US 38.9
Median household income$72,125This ZIP$72,125California$99,122US $80,734
Median home value$911,200This ZIP$911,200California$734,700US $332,700
Median gross rent$2,358This ZIP$2,358California$2,036US $1,413
Bachelor's degree or higher52.8%This ZIP52.8%
Mean commute25.3 minThis ZIP25.3 min
Population density10,490.3 / sq miThis ZIP10,490.3 / sq mi

Business and tax activity

Business establishments394This ZIP394
Employees2,774This ZIP2,774
Annual payroll$132,674,000This ZIP$132,674,000
Tax returns filed3,770This ZIP3,770
Total adjusted gross income$337,556,000This ZIP$337,556,000

Land area

Land area0.72 sq miThis ZIP0.72 sq mi
Water area0.00 sq mi

Other place names in 91020

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

ZIP codes near 91020

ZIPCityDistance
91021 Montrose, CA 0.5 mi
91046 Verdugo City, CA 0.6 mi
91224 La Crescenta, CA 1.0 mi
91011 La Canada Flintridge, CA 1.7 mi
91208 Glendale, CA 1.8 mi
91214 La Crescenta, CA 1.9 mi
91012 La Canada Flintridge, CA 2.6 mi
91202 Glendale, CA 2.7 mi
91207 Glendale, CA 3.1 mi
91206 Glendale, CA 3.7 mi

Find every ZIP code within 10 miles of 91020 →

Questions about this ZIP code

Where is ZIP code 91020?

91020 is in Montrose, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.2114, -118.2307.

What county is 91020 in?

91020 lies in Los Angeles County.

What area code is 91020?

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

What time zone is 91020 in?

91020 uses America/Los_Angeles.

How many people live in 91020?

About 7,532 people live in ZIP code 91020, in 3,149 households, at 10,490.3 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 91020?

$72,125 a year, against $99,122 across California.

What ZIP codes are near 91020?

The closest are 91021 (0.5 mi), 91046 (0.6 mi), 91224 (1 mi), 91011 (1.7 mi) and 91208 (1.8 mi).

Is 91020 a PO Box ZIP code?

91020 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91020 ZIP Code — Montrose, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91020

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