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/91103

91103

ZIP 91103 is in Pasadena, California, in Los Angeles County; area codes 626, 818 and 747; Pacific time. Pasadena has 25 ZIP codes in all.

Type
Standard
Time zone
America/Los_Angeles
County
Los Angeles
Population
25,142
Coordinates
34.1674, -118.1641
☼ Live from 91103 — Pasadena, CA

Weather right now

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Local time: —

Where 91103 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 91103
  • 🔢 Type 91103 into a pocket calculator and turn it upside down: EOIIG — not quite a word, sorry.
  • ➕ As a number, 91,103 = 17 × 23 × 233. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110001111011111
  • 🏠 Its numerical neighbours: 91102 (Pasadena, CA, 2 mi away) and 91104 (Pasadena, CA, 2 mi away).
  • 🔄 Backwards, 91103 becomes 30119 — and that is a real ZIP code: Carrollton, GA, 1,890 miles away.
  • 👥 27 other ZIP codes are made of exactly the same digits (01139, 01913, 01931, 03911, 09131, 10913, …). The farthest-flung twin is 09131 in APO AE, a military post office, 5,840 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,146 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91103 and you would come out at 34.17°S, 61.84°E — 997 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 4.6 square miles of land, 91103 is bigger than 18% of ZIP codes — room for about 3.5 Central Parks.
🌙 The sky over 91103 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population25,142This ZIP25,142
Households8,694This ZIP8,694
Housing units9,778This ZIP9,778
Median age39.9This ZIP39.9California37.9US 38.9
Median household income$93,660This ZIP$93,660California$99,122US $80,734
Median home value$983,300This ZIP$983,300California$734,700US $332,700
Median gross rent$2,085This ZIP$2,085California$2,036US $1,413
Bachelor's degree or higher39.3%This ZIP39.3%
Mean commute27.3 minThis ZIP27.3 min
Population density5,478.8 / sq miThis ZIP5,478.8 / sq mi

Business and tax activity

Business establishments724This ZIP724
Employees12,808This ZIP12,808
Annual payroll$952,772,000This ZIP$952,772,000
Tax returns filed12,000This ZIP12,000
Total adjusted gross income$1,372,291,000This ZIP$1,372,291,000

Land area

Land area4.59 sq miThis ZIP4.59 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 91103

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

ZIP codes near 91103

ZIPCityDistance
91102 Pasadena, CA 1.8 mi
91109 Pasadena, CA 1.8 mi
91110 Pasadena, CA 1.8 mi
91114 Pasadena, CA 1.8 mi
91115 Pasadena, CA 1.8 mi
91116 Pasadena, CA 1.8 mi
91117 Pasadena, CA 1.8 mi
91121 Pasadena, CA 1.8 mi
91123 Pasadena, CA 1.8 mi
91124 Pasadena, CA 1.8 mi

Find every ZIP code within 10 miles of 91103 →

Questions about this ZIP code

Where is ZIP code 91103?

91103 is in Pasadena, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.1674, -118.1641.

What county is 91103 in?

91103 lies in Los Angeles County.

What area code is 91103?

Pasadena uses area codes 626, 818 and 747, from NANPA's telephone records.

What time zone is 91103 in?

91103 uses America/Los_Angeles.

How many people live in 91103?

About 25,142 people live in ZIP code 91103, in 8,694 households, at 5,478.8 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 91103?

$93,660 a year, against $99,122 across California.

What ZIP codes are near 91103?

The closest are 91102 (1.8 mi), 91109 (1.8 mi), 91110 (1.8 mi), 91114 (1.8 mi) and 91115 (1.8 mi).

Is 91103 a PO Box ZIP code?

91103 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91103 ZIP Code — Pasadena, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91103

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