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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/94963

94963

ZIP 94963 is San Geronimo, California, in Marin County; area codes 415 and 628; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Marin
Population
739
Coordinates
38.0076, -122.6647
☼ Live from 94963 — San Geronimo, CA

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Where 94963 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 94963
  • 🔢 Type 94963 into a pocket calculator and turn it upside down: EgGhG — not quite a word, sorry.
  • ➕ As a number, 94,963 = 11 × 89 × 97. Its digits add up to 31, a total 799 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001011110011
  • 🏠 Its numerical neighbours: 94960 (San Anselmo, CA, 5 mi away) and 94964 (San Quentin, CA, 11 mi away).
  • 🔄 Backwards, 94963 becomes 36949, which is not a ZIP code at all.
  • 👥 12 other ZIP codes are made of exactly the same digits (34996, 39649, 43699, 46939, 49639, 49963, …). The farthest-flung twin is 96943 in Yap, FM, 5,689 miles away.
  • 🧭 Farther south than 58% of all ZIP codes, and farther west than 97%.
  • 🎯1,297 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94963 and you would come out at 38.01°S, 57.34°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 31m.
  • 📏 At 1.6 square miles of land, 94963 is bigger than 10% of ZIP codes — room for about 1.2 Central Parks.
🌙 The sky over 94963 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population739This ZIP739
Households239This ZIP239
Housing units239This ZIP239
Median age46.1This ZIP46.1California37.9US 38.9
Median household income$210,823This ZIP$210,823California$99,122US $80,734
Median home value$1,156,300This ZIP$1,156,300California$734,700US $332,700
Bachelor's degree or higher85.3%This ZIP85.3%
Mean commute24.1 minThis ZIP24.1 min
Population density462.7 / sq miThis ZIP462.7 / sq mi

Business and tax activity

Business establishments21This ZIP21
Employees133This ZIP133
Annual payroll$6,463,000This ZIP$6,463,000

Land area

Land area1.60 sq miThis ZIP1.60 sq mi
Water area0.00 sq mi

Other place names in 94963

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

ZIP codes near 94963

ZIPCityDistance
94973 Woodacre, CA 1.4 mi
94933 Forest Knolls, CA 1.4 mi
94930 Fairfax, CA 3.8 mi
94938 Lagunitas, CA 3.9 mi
94978 Fairfax, CA 4.4 mi
94960 San Anselmo, CA 4.8 mi
94924 Bolinas, CA 4.9 mi
94946 Nicasio, CA 4.9 mi
94950 Olema, CA 5.4 mi
94970 Stinson Beach, CA 5.7 mi

Find every ZIP code within 10 miles of 94963 →

Questions about this ZIP code

Where is ZIP code 94963?

94963 is in San Geronimo, California, in Marin County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 38.0076, -122.6647.

What county is 94963 in?

94963 lies in Marin County.

What area code is 94963?

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

What time zone is 94963 in?

94963 uses America/Los_Angeles.

How many people live in 94963?

About 739 people live in ZIP code 94963, in 239 households, at 462.7 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 94963?

$210,823 a year, against $99,122 across California.

What ZIP codes are near 94963?

The closest are 94973 (1.4 mi), 94933 (1.4 mi), 94930 (3.8 mi), 94938 (3.9 mi) and 94978 (4.4 mi).

Is 94963 a PO Box ZIP code?

94963 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “94963 ZIP Code — San Geronimo, California (Marin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94963

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