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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/91016

91016

ZIP 91016 is in Monrovia, California, in Los Angeles County; area code 626; Pacific time. Monrovia has 2 ZIP codes; the other is 91017.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
41,140
Coordinates
34.1528, -118.0005
☼ Live from 91016 — Monrovia, CA

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Where 91016 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 91016
  • 🔢 Type 91016 into a pocket calculator and turn it upside down: gIOIG — not quite a word, sorry.
  • ➕ As a number, 91,016 = 2 × 2 × 2 × 31 × 367. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110001110001000
  • 🏠 Its numerical neighbours: 91012 (La Canada Flintridge, CA, 11 mi away) and 91017 (Monrovia, CA, 0 mi away).
  • 🔄 Backwards, 91016 becomes 61019 — and that is a real ZIP code: Davis, IL, 1,643 miles away.
  • 👥 30 other ZIP codes are made of exactly the same digits (01961, 06119, 06911, 10169, 10916, 11096, …). The farthest-flung twin is 01961 in Peabody, MA, 2,583 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,138 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91016 and you would come out at 34.15°S, 62.00°E — 1,000 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 8.5 square miles of land, 91016 is bigger than 25% of ZIP codes — room for about 6.4 Central Parks.
🌙 The sky over 91016 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population41,140This ZIP41,140
Households15,285This ZIP15,285
Housing units16,042This ZIP16,042
Median age38.4This ZIP38.4California37.9US 38.9
Median household income$96,540This ZIP$96,540California$99,122US $80,734
Median home value$896,700This ZIP$896,700California$734,700US $332,700
Median gross rent$2,106This ZIP$2,106California$2,036US $1,413
Bachelor's degree or higher42.5%This ZIP42.5%
Mean commute29.8 minThis ZIP29.8 min
Population density4,852.6 / sq miThis ZIP4,852.6 / sq mi

Business and tax activity

Business establishments1,310This ZIP1,310
Employees15,929This ZIP15,929
Annual payroll$963,225,000This ZIP$963,225,000
Tax returns filed19,640This ZIP19,640
Total adjusted gross income$1,887,937,000This ZIP$1,887,937,000

Land area

Land area8.48 sq miThis ZIP8.48 sq mi
Water area0.05 sq miThis ZIP0.05 sq mi

Other place names in 91016

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

ZIP codes near 91016

ZIPCityDistance
91017 Monrovia, CA 0.3 mi
91009 Duarte, CA 1.6 mi
91008 Duarte, CA 1.8 mi
91006 Arcadia, CA 1.9 mi
91066 Arcadia, CA 2.2 mi
91077 Arcadia, CA 2.2 mi
91010 Duarte, CA 2.5 mi
91024 Sierra Madre, CA 3.0 mi
91025 Sierra Madre, CA 3.1 mi
91007 Arcadia, CA 3.2 mi

Find every ZIP code within 10 miles of 91016 →

Questions about this ZIP code

Where is ZIP code 91016?

91016 is in Monrovia, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.1528, -118.0005.

What county is 91016 in?

91016 lies in Los Angeles County.

What area code is 91016?

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

What time zone is 91016 in?

91016 uses America/Los_Angeles.

How many people live in 91016?

About 41,140 people live in ZIP code 91016, in 15,285 households, at 4,852.6 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 91016?

$96,540 a year, against $99,122 across California.

What ZIP codes are near 91016?

The closest are 91017 (0.3 mi), 91009 (1.6 mi), 91008 (1.8 mi), 91006 (1.9 mi) and 91066 (2.2 mi).

Is 91016 a PO Box ZIP code?

91016 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91016 ZIP Code — Monrovia, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91016

Machine-readable version of these facts:

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