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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/91740

91740

ZIP 91740 is in Glendora, California, in Los Angeles County; Pacific time. Glendora has 2 ZIP codes; the other is 91741.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
26,168
Coordinates
34.1194, -117.8551
☼ Live from 91740 — Glendora, CA

Weather right now

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Local time: —

Where 91740 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 91740
  • 🔢 Type 91740 into a pocket calculator and turn it upside down: OhLIG — not quite a word, sorry.
  • ➕ As a number, 91,740 = 2 × 2 × 3 × 5 × 11 × 139. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011001011100
  • 🏠 Its numerical neighbours: 91739 (Rancho Cucamonga, CA, 20 mi away) and 91741 (Glendora, CA, 3 mi away).
  • 🔄 Backwards, 91740 becomes 04719, which is not a ZIP code at all.
  • 👥 45 other ZIP codes are made of exactly the same digits (01749, 04917, 04971, 07419, 09471, 09714, …). The farthest-flung twin is 09714 in APO AE, a military post office, 5,597 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,132 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91740 and you would come out at 34.12°S, 62.14°E — 1,002 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 5.0 square miles of land, 91740 is bigger than 19% of ZIP codes — room for about 3.8 Central Parks.
🌙 The sky over 91740 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population26,168This ZIP26,168
Households8,162This ZIP8,162
Housing units8,412This ZIP8,412
Median age38.0This ZIP38.0California37.9US 38.9
Median household income$99,083This ZIP$99,083California$99,122US $80,734
Median home value$787,400This ZIP$787,400California$734,700US $332,700
Median gross rent$2,251This ZIP$2,251California$2,036US $1,413
Bachelor's degree or higher30.6%This ZIP30.6%
Mean commute32.5 minThis ZIP32.5 min
Population density5,224.2 / sq miThis ZIP5,224.2 / sq mi

Business and tax activity

Business establishments801This ZIP801
Employees11,534This ZIP11,534
Annual payroll$579,321,000This ZIP$579,321,000
Tax returns filed12,660This ZIP12,660
Total adjusted gross income$1,004,311,000This ZIP$1,004,311,000

Land area

Land area5.01 sq miThis ZIP5.01 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 91740

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

ZIP codes near 91740

ZIPCityDistance
91773 San Dimas, CA 2.8 mi
91724 Covina, CA 2.8 mi
91723 Covina, CA 3.0 mi
91741 Glendora, CA 3.3 mi
91722 Covina, CA 3.3 mi
91791 West Covina, CA 4.5 mi
91768 Pomona, CA 5.3 mi
91750 La Verne, CA 5.4 mi
91790 West Covina, CA 5.9 mi
91793 West Covina, CA 5.9 mi

Find every ZIP code within 10 miles of 91740 →

Questions about this ZIP code

Where is ZIP code 91740?

91740 is in Glendora, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.1194, -117.8551.

What county is 91740 in?

91740 lies in Los Angeles County.

What time zone is 91740 in?

91740 uses America/Los_Angeles.

How many people live in 91740?

About 26,168 people live in ZIP code 91740, in 8,162 households, at 5,224.2 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 91740?

$99,083 a year, against $99,122 across California.

What ZIP codes are near 91740?

The closest are 91773 (2.8 mi), 91724 (2.8 mi), 91723 (3 mi), 91741 (3.3 mi) and 91722 (3.3 mi).

Is 91740 a PO Box ZIP code?

91740 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91740 ZIP Code — Glendora, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91740

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