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/94978

94978

ZIP 94978 is in Fairfax, California, in Marin County; area codes 415 and 628; Pacific time. Fairfax has 2 ZIP codes; the other is 94930.

Type
No street area
Time zone
America/Los_Angeles
County
Marin
Coordinates
37.9871, -122.5889

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 94930, whose figures describe that area — not this ZIP code.

☼ Live from 94978 — Fairfax, CA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 94978 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 94978
  • 🔢 Type 94978 into a pocket calculator and turn it upside down: BLGhG — not quite a word, sorry.
  • ➕ As a number, 94,978 = 2 × 13 × 13 × 281. Its digits add up to 37, a total 89 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001100000010
  • 🏠 Its numerical neighbours: 94977 (Larkspur, CA, 5 mi away) and 94979 (San Anselmo, CA, 2 mi away).
  • 🔄 Backwards, 94978 becomes 87949, which is not a ZIP code at all.
  • 👥 12 other ZIP codes are made of exactly the same digits (47989, 49879, 78949, 79849, 79948, 87499, …). The farthest-flung twin is 99784 in White Mountain, AK, 2,471 miles away.
  • 🧭 Farther south than 58% of all ZIP codes, and farther west than 97%.
  • 🎯1,293 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94978 and you would come out at 37.99°S, 57.41°E — 1,010 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.
🌙 The sky over 94978 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments3This ZIP3
Employees8This ZIP8
Annual payroll$246,000This ZIP$246,000

Land area

ZIP codes near 94978

ZIPCityDistance
94960 San Anselmo, CA 0.9 mi
94979 San Anselmo, CA 1.7 mi
94930 Fairfax, CA 1.9 mi
94957 Ross, CA 2.2 mi
94903 San Rafael, CA 2.9 mi
94914 Kentfield, CA 3.0 mi
94973 Woodacre, CA 3.3 mi
94912 San Rafael, CA 3.3 mi
94913 San Rafael, CA 3.3 mi
94904 Greenbrae, CA 3.4 mi

Find every ZIP code within 10 miles of 94978 →

Questions about this ZIP code

Where is ZIP code 94978?

94978 is in Fairfax, California, in Marin County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.9871, -122.5889.

What county is 94978 in?

94978 lies in Marin County.

What area code is 94978?

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

What time zone is 94978 in?

94978 uses America/Los_Angeles.

What ZIP codes are near 94978?

The closest are 94960 (0.9 mi), 94979 (1.7 mi), 94930 (1.9 mi), 94957 (2.2 mi) and 94903 (2.9 mi).

Is 94978 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

Download or cite

Cite this page

zipcodes.pro. “94978 ZIP Code — Fairfax, California (Marin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94978

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94978.json

Underlying data is public domain or openly licensed — sources, vintages and licences.