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/91125

91125

ZIP 91125 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
1,000
Coordinates
34.1376, -118.1250
☼ Live from 91125 — Pasadena, CA

Weather right now

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Where 91125 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 91125
  • 🔢 Type 91125 into a pocket calculator and turn it upside down: SZIIG — not quite a word, sorry.
  • ➕ As a number, 91,125 = 3 × 3 × 3 × 3 × 3 × 3 × 5 × 5 × 5. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110001111110101
  • 🏠 Its numerical neighbours: 91124 (Pasadena, CA, 1 mi away) and 91126 (Pasadena, CA, 1 mi away).
  • 🔄 Backwards, 91125 becomes 52119, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (11952, 12159, 12195, 12915, 15129, 15219, …). The farthest-flung twin is 11952 in Mattituck, NY, 2,512 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 91%.
  • 🎯1,145 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91125 and you would come out at 34.14°S, 61.88°E — 996 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 0.177 square miles of land, 91125 is bigger than 2% of ZIP codes — about 86 football fields.
🌙 The sky over 91125 today
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🌋 Shake report
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Source: USGS.

People and housing

Population1,000This ZIP1,000
Households97This ZIP97
Housing units97This ZIP97
Median age21.7This ZIP21.7California37.9US 38.9
Bachelor's degree or higher30.9%This ZIP30.9%
Mean commute20.1 minThis ZIP20.1 min
Population density5,649.7 / sq miThis ZIP5,649.7 / sq mi

Business and tax activity

Business establishments5This ZIP5
Employees4,996This ZIP4,996
Annual payroll$363,688,000This ZIP$363,688,000

Land area

Land area0.18 sq miThis ZIP0.18 sq mi
Water area0.00 sq mi

Other place names in 91125

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

ZIP codes near 91125

ZIPCityDistance
91106 Pasadena, CA 0.2 mi
91101 Pasadena, CA 1.0 mi
91108 San Marino, CA 1.2 mi
91199 Pasadena, CA 1.3 mi
91102 Pasadena, CA 1.3 mi
91109 Pasadena, CA 1.3 mi
91110 Pasadena, CA 1.3 mi
91114 Pasadena, CA 1.3 mi
91115 Pasadena, CA 1.3 mi
91116 Pasadena, CA 1.3 mi

Find every ZIP code within 10 miles of 91125 →

Questions about this ZIP code

Where is ZIP code 91125?

91125 is in Pasadena, California, in Los Angeles County, part of the Los Angeles-Long Beach-Anaheim, CA metropolitan area. Its published point location is 34.1376, -118.1250.

What county is 91125 in?

91125 lies in Los Angeles County.

What area code is 91125?

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

What time zone is 91125 in?

91125 uses America/Los_Angeles.

How many people live in 91125?

About 1,000 people live in ZIP code 91125, in 97 households, at 5,649.7 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 91125?

The closest are 91106 (0.2 mi), 91101 (1 mi), 91108 (1.2 mi), 91199 (1.3 mi) and 91102 (1.3 mi).

Is 91125 a PO Box ZIP code?

91125 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91125 ZIP Code — Pasadena, California (Los Angeles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91125

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