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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/94603

94603

ZIP 94603 is in Oakland, California, in Alameda County; area codes 510 and 341; Pacific time. Oakland has 26 ZIP codes in all.

Type
Standard
Time zone
America/Los_Angeles
County
Alameda
Population
35,742
Coordinates
37.7393, -122.1755
☼ Live from 94603 — Oakland, CA

Weather right now

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Local time: —

Where 94603 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 94603
  • 🔢 Type 94603 into a pocket calculator and turn it upside down: EOghG — not quite a word, sorry.
  • ➕ 94603 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000110001011
  • 🏠 Its numerical neighbours: 94602 (Oakland, CA, 5 mi away) and 94604 (Oakland, CA, 7 mi away).
  • 🔄 Backwards, 94603 becomes 30649, which is not a ZIP code at all.
  • 👥 43 other ZIP codes are made of exactly the same digits (03469, 04693, 04936, 04963, 06349, 06439, …). The farthest-flung twin is 09643 in APO AE, a military post office, 5,780 miles away.
  • 🧭 Farther south than 60% of all ZIP codes, and farther west than 96%.
  • 🎯1,275 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94603 and you would come out at 37.74°S, 57.82°E — 1,012 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 47m of daylight. Shortest: 9h 33m.
  • 📏 At 2.7 square miles of land, 94603 is bigger than 14% of ZIP codes — room for about 2.0 Central Parks.
🌙 The sky over 94603 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population35,742This ZIP35,742
Households10,527This ZIP10,527
Housing units11,133This ZIP11,133
Median age34.8This ZIP34.8California37.9US 38.9
Median household income$76,723This ZIP$76,723California$99,122US $80,734
Median home value$614,700This ZIP$614,700California$734,700US $332,700
Median gross rent$1,842This ZIP$1,842California$2,036US $1,413
Bachelor's degree or higher14.7%This ZIP14.7%
Mean commute27.0 minThis ZIP27.0 min
Population density13,247.6 / sq miThis ZIP13,247.6 / sq mi

Business and tax activity

Business establishments303This ZIP303
Employees4,003This ZIP4,003
Annual payroll$360,554,000This ZIP$360,554,000
Tax returns filed15,390This ZIP15,390
Total adjusted gross income$869,184,000This ZIP$869,184,000

Land area

Land area2.70 sq miThis ZIP2.70 sq mi
Water area0.00 sq mi

Other place names in 94603

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

ZIP codes near 94603

ZIPCityDistance
94577 San Leandro, CA 1.6 mi
94614 Oakland, CA 1.8 mi
94621 Oakland, CA 2.1 mi
94605 Oakland, CA 2.1 mi
94613 Oakland, CA 2.9 mi
94601 Oakland, CA 3.4 mi
94502 Alameda, CA 3.5 mi
94578 San Leandro, CA 3.5 mi
94579 San Leandro, CA 3.8 mi
94619 Oakland, CA 3.8 mi

Find every ZIP code within 10 miles of 94603 →

Questions about this ZIP code

Where is ZIP code 94603?

94603 is in Oakland, California, in Alameda County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.7393, -122.1755.

What county is 94603 in?

94603 lies in Alameda County.

What area code is 94603?

Oakland uses area codes 510 and 341, from NANPA's telephone records.

What time zone is 94603 in?

94603 uses America/Los_Angeles.

How many people live in 94603?

About 35,742 people live in ZIP code 94603, in 10,527 households, at 13,247.6 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 94603?

$76,723 a year, against $99,122 across California.

What ZIP codes are near 94603?

The closest are 94577 (1.6 mi), 94614 (1.8 mi), 94621 (2.1 mi), 94605 (2.1 mi) and 94613 (2.9 mi).

Is 94603 a PO Box ZIP code?

94603 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94603 ZIP Code — Oakland, California (Alameda County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94603

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