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/94942

94942

ZIP 94942 is in Mill Valley, California, in Marin County; area codes 415 and 628; Pacific time. Mill Valley has 2 ZIP codes; the other is 94941.

Type
No street area
Time zone
America/Los_Angeles
County
Marin
Coordinates
37.9060, -122.5450

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 94941, whose figures describe that area — not this ZIP code.

☼ Live from 94942 — Mill Valley, CA

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Where 94942 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 94942
  • 🔢 Type 94942 into a pocket calculator and turn it upside down: ZhGhG — not quite a word, sorry.
  • ➕ As a number, 94,942 = 2 × 37 × 1283. Its digits add up to 28, a total 1,520 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001011011110
  • 🏠 Its numerical neighbours: 94941 (Mill Valley, CA, 3 mi away) and 94945 (Novato, CA, 15 mi away).
  • 🔄 Backwards, 94942 becomes 24949, which is not a ZIP code at all.
  • 👥 8 other ZIP codes are made of exactly the same digits (29449, 29944, 49249, 49429, 49942, 94249, …). The farthest-flung twin is 29449 in Hollywood, SC, 2,390 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 94942 and you would come out at 37.91°S, 57.45°E — 1,013 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.
🌙 The sky over 94942 today
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Source: USGS.

Business and tax activity

Business establishments13This ZIP13
Employees49This ZIP49
Annual payroll$3,033,000This ZIP$3,033,000

Land area

ZIP codes near 94942

ZIPCityDistance
94976 Corte Madera, CA 1.7 mi
94977 Larkspur, CA 2.0 mi
94939 Larkspur, CA 2.3 mi
94925 Corte Madera, CA 2.7 mi
94904 Greenbrae, CA 2.9 mi
94914 Kentfield, CA 3.3 mi
94941 Mill Valley, CA 3.3 mi
94964 San Quentin, CA 3.8 mi
94957 Ross, CA 4.1 mi
94974 San Quentin, CA 4.1 mi

Find every ZIP code within 10 miles of 94942 →

Questions about this ZIP code

Where is ZIP code 94942?

94942 is in Mill Valley, California, in Marin County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.9060, -122.5450.

What county is 94942 in?

94942 lies in Marin County.

What area code is 94942?

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

What time zone is 94942 in?

94942 uses America/Los_Angeles.

What ZIP codes are near 94942?

The closest are 94976 (1.7 mi), 94977 (2 mi), 94939 (2.3 mi), 94925 (2.7 mi) and 94904 (2.9 mi).

Is 94942 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.

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Cite this page

zipcodes.pro. “94942 ZIP Code — Mill Valley, California (Marin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94942

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94942.json

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