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/94304

94304

ZIP 94304 is in Palo Alto, California, in Santa Clara County; area code 650; Pacific time. Palo Alto has 6 ZIP codes; the others are 94301, 94302, 94303, 94306 and 94309.

Type
Standard
Time zone
America/Los_Angeles
County
Santa Clara
Population
5,000
Coordinates
37.3973, -122.1670
☼ Live from 94304 — Palo Alto, CA

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Local time: —

Where 94304 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 94304
  • 🔢 Type 94304 into a pocket calculator and turn it upside down: hOEhG — not quite a word, sorry.
  • ➕ As a number, 94,304 = 2 × 2 × 2 × 2 × 2 × 7 × 421. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000001100000
  • 🏠 Its numerical neighbours: 94303 (Palo Alto, CA, 5 mi away) and 94305 (Stanford, CA, 1 mi away).
  • 🔄 Backwards, 94304 becomes 40349, which is not a ZIP code at all.
  • 👥 24 other ZIP codes are made of exactly the same digits (03449, 04349, 04493, 04943, 30449, 39044, …). The farthest-flung twin is 04493 in West Enfield, ME, 2,782 miles away.
  • 🧭 Farther south than 62% of all ZIP codes, and farther west than 96%.
  • 🎯1,281 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94304 and you would come out at 37.40°S, 57.83°E — 1,031 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 45m of daylight. Shortest: 9h 35m.
  • 📏 At 4.8 square miles of land, 94304 is bigger than 18% of ZIP codes — room for about 3.6 Central Parks.
🌙 The sky over 94304 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population5,000This ZIP5,000
Households2,218This ZIP2,218
Housing units2,560This ZIP2,560
Median age38.6This ZIP38.6California37.9US 38.9
Median household income$154,141This ZIP$154,141California$99,122US $80,734
Median home value$2,000,000+This ZIP$2,000,000+California$734,700US $332,700
Median gross rent$3,500+This ZIP$3,500+California$2,036US $1,413
Bachelor's degree or higher82.2%This ZIP82.2%
Mean commute19.0 minThis ZIP19.0 min
Population density1,040.1 / sq miThis ZIP1,040.1 / sq mi

Business and tax activity

Business establishments483This ZIP483
Employees56,576This ZIP56,576
Annual payroll$14,548,975,000This ZIP$14,548,975,000
Tax returns filed1,940This ZIP1,940
Total adjusted gross income$3,110,935,000This ZIP$3,110,935,000

Land area

Land area4.81 sq miThis ZIP4.81 sq mi
Water area0.00 sq mi

Other place names in 94304

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

ZIP codes near 94304

ZIPCityDistance
94305 Stanford, CA 1.5 mi
94306 Palo Alto, CA 2.4 mi
94028 Portola Valley, CA 2.9 mi
94023 Los Altos, CA 3.0 mi
94022 Los Altos, CA 3.1 mi
94302 Palo Alto, CA 3.4 mi
94309 Palo Alto, CA 3.4 mi
94301 Palo Alto, CA 3.4 mi
94025 Menlo Park, CA 3.8 mi
94027 Atherton, CA 4.5 mi

Find every ZIP code within 10 miles of 94304 →

Questions about this ZIP code

Where is ZIP code 94304?

94304 is in Palo Alto, California, in Santa Clara County, part of the San Jose-Sunnyvale-Santa Clara, CA metropolitan area. Its published point location is 37.3973, -122.1670.

What county is 94304 in?

94304 lies in Santa Clara County.

What area code is 94304?

Palo Alto uses area code 650, from NANPA's telephone records.

What time zone is 94304 in?

94304 uses America/Los_Angeles.

How many people live in 94304?

About 5,000 people live in ZIP code 94304, in 2,218 households, at 1,040.1 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 94304?

$154,141 a year, against $99,122 across California.

What ZIP codes are near 94304?

The closest are 94305 (1.5 mi), 94306 (2.4 mi), 94028 (2.9 mi), 94023 (3 mi) and 94022 (3.1 mi).

Is 94304 a PO Box ZIP code?

94304 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94304 ZIP Code — Palo Alto, California (Santa Clara County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94304

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