Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/91803

91803

ZIP 91803 is in Alhambra, California, in Los Angeles County; area code 626; Pacific time. Alhambra has 6 ZIP codes; the others are 91801, 91802, 91804, 91896 and 91899.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
27,715
Coordinates
34.0747, -118.1460
☼ Live from 91803 — Alhambra, CA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 91803 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 91803
  • 🔢 Type 91803 into a pocket calculator and turn it upside down: EOBIG — not quite a word, sorry.
  • ➕ As a number, 91,803 = 3 × 71 × 431. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011010011011
  • 🏠 Its numerical neighbours: 91802 (Alhambra, CA, 2 mi away) and 91804 (Alhambra, CA, 2 mi away).
  • 🔄 Backwards, 91803 becomes 30819 — and that is a real ZIP code: Mesena, GA, 2,032 miles away.
  • 👥 47 other ZIP codes are made of exactly the same digits (01938, 01983, 03819, 08319, 09138, 09183, …). The farthest-flung twin is 09831 in APO AE, a military post office, 9,653 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,148 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91803 and you would come out at 34.07°S, 61.85°E — 992 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 3.3 square miles of land, 91803 is bigger than 15% of ZIP codes — room for about 2.5 Central Parks.
🌙 The sky over 91803 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population27,715This ZIP27,715
Households10,028This ZIP10,028
Housing units10,700This ZIP10,700
Median age41.8This ZIP41.8California37.9US 38.9
Median household income$84,311This ZIP$84,311California$99,122US $80,734
Median home value$888,600This ZIP$888,600California$734,700US $332,700
Median gross rent$1,847This ZIP$1,847California$2,036US $1,413
Bachelor's degree or higher38.3%This ZIP38.3%
Mean commute30.0 minThis ZIP30.0 min
Population density8,501.5 / sq miThis ZIP8,501.5 / sq mi

Business and tax activity

Business establishments876This ZIP876
Employees7,125This ZIP7,125
Annual payroll$379,759,000This ZIP$379,759,000
Tax returns filed14,790This ZIP14,790
Total adjusted gross income$1,021,666,000This ZIP$1,021,666,000

Land area

Land area3.26 sq miThis ZIP3.26 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 91803

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

ZIP codes near 91803

ZIPCityDistance
91754 Monterey Park, CA 1.5 mi
91801 Alhambra, CA 1.5 mi
91756 Monterey Park, CA 1.6 mi
91802 Alhambra, CA 1.8 mi
91804 Alhambra, CA 1.8 mi
91896 Alhambra, CA 1.8 mi
91899 Alhambra, CA 1.8 mi
90032 Los Angeles, CA 2.3 mi
91755 Monterey Park, CA 2.4 mi
91030 South Pasadena, CA 2.4 mi

Find every ZIP code within 10 miles of 91803 →

Questions about this ZIP code

Where is ZIP code 91803?

91803 is in Alhambra, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.0747, -118.1460.

What county is 91803 in?

91803 lies in Los Angeles County.

What area code is 91803?

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

What time zone is 91803 in?

91803 uses America/Los_Angeles.

How many people live in 91803?

About 27,715 people live in ZIP code 91803, in 10,028 households, at 8,501.5 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 91803?

$84,311 a year, against $99,122 across California.

What ZIP codes are near 91803?

The closest are 91754 (1.5 mi), 91801 (1.5 mi), 91756 (1.6 mi), 91802 (1.8 mi) and 91804 (1.8 mi).

Is 91803 a PO Box ZIP code?

91803 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “91803 ZIP Code — Alhambra, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91803

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/91803.json

Underlying data is public domain or openly licensed — sources, vintages and licences.