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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/91723

91723

ZIP 91723 is in Covina, California, in Los Angeles County; area code 626; Pacific time. Covina has 3 ZIP codes; the others are 91722 and 91724.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
17,733
Coordinates
34.0847, -117.8868
☼ Live from 91723 — Covina, CA

Weather right now

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Local time: —

Where 91723 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 91723
  • 🔢 Type 91723 into a pocket calculator and turn it upside down: EZLIG — not quite a word, sorry.
  • ➕ As a number, 91,723 = 37 × 37 × 67. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011001001011
  • 🏠 Its numerical neighbours: 91722 (Covina, CA, 1 mi away) and 91724 (Covina, CA, 2 mi away).
  • 🔄 Backwards, 91723 becomes 32719 — and that is a real ZIP code: Winter Springs, FL, 2,181 miles away.
  • 👥 50 other ZIP codes are made of exactly the same digits (12937, 12973, 17239, 17329, 17923, 17932, …). The farthest-flung twin is 12937 in Fort Covington, NY, 2,400 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,135 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91723 and you would come out at 34.08°S, 62.11°E — 999 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 53m.
  • 📏 At 2.3 square miles of land, 91723 is bigger than 13% of ZIP codes — room for about 1.8 Central Parks.
🌙 The sky over 91723 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population17,733This ZIP17,733
Households6,088This ZIP6,088
Housing units6,307This ZIP6,307
Median age37.7This ZIP37.7California37.9US 38.9
Median household income$94,167This ZIP$94,167California$99,122US $80,734
Median home value$717,300This ZIP$717,300California$734,700US $332,700
Median gross rent$1,801This ZIP$1,801California$2,036US $1,413
Bachelor's degree or higher25.2%This ZIP25.2%
Mean commute31.0 minThis ZIP31.0 min
Population density7,600.9 / sq miThis ZIP7,600.9 / sq mi

Business and tax activity

Business establishments879This ZIP879
Employees8,945This ZIP8,945
Annual payroll$553,352,000This ZIP$553,352,000
Tax returns filed9,930This ZIP9,930
Total adjusted gross income$832,381,000This ZIP$832,381,000

Land area

Land area2.33 sq miThis ZIP2.33 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 91723

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

ZIP codes near 91723

ZIPCityDistance
91722 Covina, CA 1.4 mi
91791 West Covina, CA 1.6 mi
91724 Covina, CA 1.9 mi
91740 Glendora, CA 3.0 mi
91790 West Covina, CA 3.1 mi
91793 West Covina, CA 3.2 mi
91792 West Covina, CA 4.4 mi
91788 Walnut, CA 4.6 mi
91744 La Puente, CA 4.7 mi
91773 San Dimas, CA 4.7 mi

Find every ZIP code within 10 miles of 91723 →

Questions about this ZIP code

Where is ZIP code 91723?

91723 is in Covina, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.0847, -117.8868.

What county is 91723 in?

91723 lies in Los Angeles County.

What area code is 91723?

Covina uses area code 626, from NANPA's telephone records.

What time zone is 91723 in?

91723 uses America/Los_Angeles.

How many people live in 91723?

About 17,733 people live in ZIP code 91723, in 6,088 households, at 7,600.9 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 91723?

$94,167 a year, against $99,122 across California.

What ZIP codes are near 91723?

The closest are 91722 (1.4 mi), 91791 (1.6 mi), 91724 (1.9 mi), 91740 (3 mi) and 91790 (3.1 mi).

Is 91723 a PO Box ZIP code?

91723 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91723 ZIP Code — Covina, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91723

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