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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/94904

94904

ZIP 94904 is Greenbrae, California, in Marin County; area codes 415 and 628; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Marin
Population
12,815
Coordinates
37.9472, -122.5518
☼ Live from 94904 — Greenbrae, CA

Weather right now

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Local time: —

Where 94904 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 94904
  • 🔢 Type 94904 into a pocket calculator and turn it upside down: hOGhG — not quite a word, sorry.
  • ➕ As a number, 94,904 = 2 × 2 × 2 × 11863. Its digits add up to 26, a total 2,038 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001010111000
  • 🏠 Its numerical neighbours: 94903 (San Rafael, CA, 5 mi away) and 94912 (San Rafael, CA, 2 mi away).
  • 🔄 Backwards, 94904 becomes 40949 — and that is a real ZIP code: Heidrick, KY, 2,108 miles away.
  • 👥 8 other ZIP codes are made of exactly the same digits (04949, 09449, 09494, 40949, 44099, 49094, …). The farthest-flung twin is 09449 in APO AE, a military post office, 5,335 miles away.
  • 🧭 Farther south than 59% of all ZIP codes, and farther west than 97%.
  • 🎯1,292 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94904 and you would come out at 37.95°S, 57.45°E — 1,011 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 48m of daylight. Shortest: 9h 32m.
  • 📏 At 4.9 square miles of land, 94904 is bigger than 19% of ZIP codes — room for about 3.8 Central Parks.
🌙 The sky over 94904 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population12,815This ZIP12,815
Households5,558This ZIP5,558
Housing units5,975This ZIP5,975
Median age50.9This ZIP50.9California37.9US 38.9
Median household income$169,118This ZIP$169,118California$99,122US $80,734
Median home value$2,000,000+This ZIP$2,000,000+California$734,700US $332,700
Median gross rent$2,712This ZIP$2,712California$2,036US $1,413
Bachelor's degree or higher73.5%This ZIP73.5%
Mean commute26.6 minThis ZIP26.6 min
Population density2,590.5 / sq miThis ZIP2,590.5 / sq mi

Business and tax activity

Business establishments472This ZIP472
Employees5,815This ZIP5,815
Annual payroll$574,274,000This ZIP$574,274,000
Tax returns filed6,040This ZIP6,040
Total adjusted gross income$2,580,182,000This ZIP$2,580,182,000

Land area

Land area4.95 sq miThis ZIP4.95 sq mi
Water area0.10 sq miThis ZIP0.10 sq mi

Other place names in 94904

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

ZIP codes near 94904

ZIPCityDistance
94914 Kentfield, CA 0.4 mi
94939 Larkspur, CA 1.1 mi
94957 Ross, CA 1.2 mi
94977 Larkspur, CA 1.3 mi
94979 San Anselmo, CA 2.0 mi
94976 Corte Madera, CA 2.0 mi
94912 San Rafael, CA 2.1 mi
94913 San Rafael, CA 2.1 mi
94925 Corte Madera, CA 2.6 mi
94942 Mill Valley, CA 2.9 mi

Find every ZIP code within 10 miles of 94904 →

Questions about this ZIP code

Where is ZIP code 94904?

94904 is in Greenbrae, California, in Marin County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.9472, -122.5518.

What county is 94904 in?

94904 lies in Marin County.

What area code is 94904?

Greenbrae uses area codes 415 and 628, from NANPA's telephone records.

What time zone is 94904 in?

94904 uses America/Los_Angeles.

How many people live in 94904?

About 12,815 people live in ZIP code 94904, in 5,558 households, at 2,590.5 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 94904?

$169,118 a year, against $99,122 across California.

What ZIP codes are near 94904?

The closest are 94914 (0.4 mi), 94939 (1.1 mi), 94957 (1.2 mi), 94977 (1.3 mi) and 94979 (2 mi).

Is 94904 a PO Box ZIP code?

94904 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94904 ZIP Code — Greenbrae, California (Marin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94904

Machine-readable version of these facts:

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