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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/94903

94903

ZIP 94903 is in San Rafael, California, in Marin County; area codes 415 and 628; Pacific time. San Rafael has 5 ZIP codes; the others are 94901, 94912, 94913 and 94915.

Type
Standard
Time zone
America/Los_Angeles
County
Marin
Population
30,615
Coordinates
38.0221, -122.5588
☼ Live from 94903 — San Rafael, CA

Weather right now

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Where 94903 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 94903
  • 🔢 Type 94903 into a pocket calculator and turn it upside down: EOGhG — not quite a word, sorry.
  • ➕ 94903 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001010110111
  • 🏠 Its numerical neighbours: 94901 (San Rafael, CA, 4 mi away) and 94904 (Greenbrae, CA, 5 mi away).
  • 🔄 Backwards, 94903 becomes 30949, which is not a ZIP code at all.
  • 👥 19 other ZIP codes are made of exactly the same digits (04939, 30499, 34990, 39094, 40939, 43909, …). The farthest-flung twin is 04939 in Garland, ME, 2,753 miles away.
  • 🧭 Farther south than 58% of all ZIP codes, and farther west than 97%.
  • 🎯1,291 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94903 and you would come out at 38.02°S, 57.44°E — 1,007 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 31m.
  • 📏 At 19.9 square miles of land, 94903 is bigger than 37% of ZIP codes — room for about 15 Central Parks.
🌙 The sky over 94903 today
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🌋 Shake report
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Source: USGS.

People and housing

Population30,615This ZIP30,615
Households12,013This ZIP12,013
Housing units12,665This ZIP12,665
Median age49.5This ZIP49.5California37.9US 38.9
Median household income$142,083This ZIP$142,083California$99,122US $80,734
Median home value$1,197,300This ZIP$1,197,300California$734,700US $332,700
Median gross rent$2,993This ZIP$2,993California$2,036US $1,413
Bachelor's degree or higher55.5%This ZIP55.5%
Mean commute27.0 minThis ZIP27.0 min
Population density1,539.6 / sq miThis ZIP1,539.6 / sq mi

Business and tax activity

Business establishments1,144This ZIP1,144
Employees15,001This ZIP15,001
Annual payroll$1,459,885,000This ZIP$1,459,885,000
Tax returns filed14,620This ZIP14,620
Total adjusted gross income$2,529,041,000This ZIP$2,529,041,000

Land area

Land area19.89 sq miThis ZIP19.89 sq mi
Water area0.68 sq miThis ZIP0.68 sq mi

Other place names in 94903

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

ZIP codes near 94903

ZIPCityDistance
94960 San Anselmo, CA 2.0 mi
94978 Fairfax, CA 2.9 mi
94979 San Anselmo, CA 3.3 mi
94915 San Rafael, CA 3.6 mi
94912 San Rafael, CA 3.7 mi
94913 San Rafael, CA 3.7 mi
94949 Novato, CA 3.9 mi
94957 Ross, CA 4.1 mi
94901 San Rafael, CA 4.3 mi
94973 Woodacre, CA 4.4 mi

Find every ZIP code within 10 miles of 94903 →

Questions about this ZIP code

Where is ZIP code 94903?

94903 is in San Rafael, California, in Marin County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 38.0221, -122.5588.

What county is 94903 in?

94903 lies in Marin County.

What area code is 94903?

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

What time zone is 94903 in?

94903 uses America/Los_Angeles.

How many people live in 94903?

About 30,615 people live in ZIP code 94903, in 12,013 households, at 1,539.6 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 94903?

$142,083 a year, against $99,122 across California.

What ZIP codes are near 94903?

The closest are 94960 (2 mi), 94978 (2.9 mi), 94979 (3.3 mi), 94915 (3.6 mi) and 94912 (3.7 mi).

Is 94903 a PO Box ZIP code?

94903 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94903 ZIP Code — San Rafael, California (Marin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94903

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