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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/91104

91104

ZIP 91104 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
35,937
Coordinates
34.1654, -118.1238
☼ Live from 91104 — Pasadena, CA

Weather right now

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NEXRAD radar
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Local time: —

Where 91104 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 91104
  • 🔢 Type 91104 into a pocket calculator and turn it upside down: hOIIG — not quite a word, sorry.
  • ➕ As a number, 91,104 = 2 × 2 × 2 × 2 × 2 × 3 × 13 × 73. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110001111100000
  • 🏠 Its numerical neighbours: 91103 (Pasadena, CA, 2 mi away) and 91105 (Pasadena, CA, 3 mi away).
  • 🔄 Backwards, 91104 becomes 40119 — and that is a real ZIP code: Falls Of Rough, KY, 1,775 miles away.
  • 👥 25 other ZIP codes are made of exactly the same digits (04911, 09114, 09141, 10914, 10941, 11940, …). The farthest-flung twin is 09114 in APO AE, a military post office, 5,884 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,144 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91104 and you would come out at 34.17°S, 61.88°E — 998 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 3.8 square miles of land, 91104 is bigger than 16% of ZIP codes — room for about 2.9 Central Parks.
🌙 The sky over 91104 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population35,937This ZIP35,937
Households13,488This ZIP13,488
Housing units14,498This ZIP14,498
Median age41.7This ZIP41.7California37.9US 38.9
Median household income$105,958This ZIP$105,958California$99,122US $80,734
Median home value$1,080,100This ZIP$1,080,100California$734,700US $332,700
Median gross rent$2,063This ZIP$2,063California$2,036US $1,413
Bachelor's degree or higher50.0%This ZIP50.0%
Mean commute28.7 minThis ZIP28.7 min
Population density9,529.8 / sq miThis ZIP9,529.8 / sq mi

Business and tax activity

Business establishments825This ZIP825
Employees4,524This ZIP4,524
Annual payroll$205,548,000This ZIP$205,548,000
Tax returns filed16,240This ZIP16,240
Total adjusted gross income$1,672,827,000This ZIP$1,672,827,000

Land area

Land area3.77 sq miThis ZIP3.77 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 91104

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

ZIP codes near 91104

ZIPCityDistance
91101 Pasadena, CA 1.5 mi
91199 Pasadena, CA 1.7 mi
91102 Pasadena, CA 1.7 mi
91109 Pasadena, CA 1.7 mi
91110 Pasadena, CA 1.7 mi
91114 Pasadena, CA 1.7 mi
91115 Pasadena, CA 1.7 mi
91116 Pasadena, CA 1.7 mi
91117 Pasadena, CA 1.7 mi
91121 Pasadena, CA 1.7 mi

Find every ZIP code within 10 miles of 91104 →

Questions about this ZIP code

Where is ZIP code 91104?

91104 is in Pasadena, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.1654, -118.1238.

What county is 91104 in?

91104 lies in Los Angeles County.

What area code is 91104?

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

What time zone is 91104 in?

91104 uses America/Los_Angeles.

How many people live in 91104?

About 35,937 people live in ZIP code 91104, in 13,488 households, at 9,529.8 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 91104?

$105,958 a year, against $99,122 across California.

What ZIP codes are near 91104?

The closest are 91101 (1.5 mi), 91199 (1.7 mi), 91102 (1.7 mi), 91109 (1.7 mi) and 91110 (1.7 mi).

Is 91104 a PO Box ZIP code?

91104 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91104 ZIP Code — Pasadena, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91104

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