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/94940

94940

ZIP 94940 is Marshall, California, in Marin County; area code 707; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Marin
Population
148
Coordinates
38.2040, -122.8915
☼ Live from 94940 — Marshall, CA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 94940 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 94940
  • 🔢 Type 94940 into a pocket calculator and turn it upside down: OhGhG — not quite a word, sorry.
  • ➕ As a number, 94,940 = 2 × 2 × 5 × 47 × 101. Its digits add up to 26, a total 2,038 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001011011100
  • 🏠 Its numerical neighbours: 94939 (Larkspur, CA, 27 mi away) and 94941 (Mill Valley, CA, 25 mi away).
  • 🔄 Backwards, 94940 becomes 04949 — and that is a real ZIP code: Liberty, ME, 2,763 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, 5,330 miles away.
  • 🧭 Farther south than 57% of all ZIP codes, and farther west than 98%.
  • 🎯1,306 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94940 and you would come out at 38.20°S, 57.11°E — 1,007 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 49m of daylight. Shortest: 9h 30m.
  • 📏 At 26.2 square miles of land, 94940 is bigger than 43% of ZIP codes — room for about 20 Central Parks.
🌙 The sky over 94940 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population148This ZIP148
Households97This ZIP97
Housing units162This ZIP162
Median age57.4This ZIP57.4California37.9US 38.9
Median household income$47,021This ZIP$47,021California$99,122US $80,734
Median home value$2,000,000+This ZIP$2,000,000+California$734,700US $332,700
Bachelor's degree or higher100.0%This ZIP100.0%
Population density5.6 / sq miThis ZIP5.6 / sq mi

Business and tax activity

Business establishments10This ZIP10
Employees123This ZIP123
Annual payroll$8,413,000This ZIP$8,413,000

Land area

Land area26.20 sq miThis ZIP26.20 sq mi
Water area4.70 sq miThis ZIP4.70 sq mi

ZIP codes near 94940

ZIPCityDistance
94971 Tomales, CA 2.0 mi
94929 Dillon Beach, CA 5.2 mi
94937 Inverness, CA 6.4 mi
94952 Petaluma, CA 7.4 mi
94972 Valley Ford, CA 9.5 mi
94922 Bodega, CA 11.0 mi
94923 Bodega Bay, CA 12.2 mi
94931 Cotati, CA 12.6 mi
94956 Point Reyes Station, CA 13.2 mi
94999 Petaluma, CA 13.4 mi

Find every ZIP code within 10 miles of 94940 →

Questions about this ZIP code

Where is ZIP code 94940?

94940 is in Marshall, California, in Marin County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 38.2040, -122.8915.

What county is 94940 in?

94940 lies in Marin County.

What area code is 94940?

Marshall uses area code 707, from NANPA's telephone records.

What time zone is 94940 in?

94940 uses America/Los_Angeles.

How many people live in 94940?

About 148 people live in ZIP code 94940, in 97 households, at 5.6 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 94940?

$47,021 a year, against $99,122 across California.

What ZIP codes are near 94940?

The closest are 94971 (2 mi), 94929 (5.2 mi), 94937 (6.4 mi), 94952 (7.4 mi) and 94972 (9.5 mi).

Is 94940 a PO Box ZIP code?

94940 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “94940 ZIP Code — Marshall, California (Marin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94940

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94940.json

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