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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/94596

94596

ZIP 94596 is in Walnut Creek, California, in Contra Costa County; area code 925; Pacific time. Walnut Creek has 4 ZIP codes; the others are 94595, 94597 and 94598.

Type
Standard
Time zone
America/Los_Angeles
County
Contra Costa
Population
23,417
Coordinates
37.8890, -122.0368
☼ Live from 94596 — Walnut Creek, CA

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Local time: —

Where 94596 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 94596
  • 🔢 Type 94596 into a pocket calculator and turn it upside down: gGShG — not quite a word, sorry.
  • ➕ As a number, 94,596 = 2 × 2 × 3 × 7883. Its digits add up to 33, a total 456 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000110000100
  • 🏠 Its numerical neighbours: 94595 (Walnut Creek, CA, 2 mi away) and 94597 (Walnut Creek, CA, 3 mi away).
  • 🔄 Backwards, 94596 becomes 69549, which is not a ZIP code at all.
  • 👥 19 other ZIP codes are made of exactly the same digits (45699, 46959, 46995, 49659, 49965, 54969, …). The farthest-flung twin is 96549 in APO AA, a military post office, 7,600 miles away.
  • 🧭 Farther south than 59% of all ZIP codes, and farther west than 96%.
  • 🎯1,265 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94596 and you would come out at 37.89°S, 57.96°E — 999 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.
  • 📏 At 6.1 square miles of land, 94596 is bigger than 21% of ZIP codes — room for about 4.6 Central Parks.
🌙 The sky over 94596 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population23,417This ZIP23,417
Households11,009This ZIP11,009
Housing units11,461This ZIP11,461
Median age37.1This ZIP37.1California37.9US 38.9
Median household income$135,635This ZIP$135,635California$99,122US $80,734
Median home value$1,277,800This ZIP$1,277,800California$734,700US $332,700
Median gross rent$2,574This ZIP$2,574California$2,036US $1,413
Bachelor's degree or higher71.2%This ZIP71.2%
Mean commute31.8 minThis ZIP31.8 min
Population density3,862.9 / sq miThis ZIP3,862.9 / sq mi

Business and tax activity

Business establishments2,061This ZIP2,061
Employees32,387This ZIP32,387
Annual payroll$3,323,330,000This ZIP$3,323,330,000
Tax returns filed11,530This ZIP11,530
Total adjusted gross income$2,160,717,000This ZIP$2,160,717,000

Land area

Land area6.06 sq miThis ZIP6.06 sq mi
Water area0.00 sq mi

Other place names in 94596

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

ZIP codes near 94596

ZIPCityDistance
94595 Walnut Creek, CA 2.1 mi
94598 Walnut Creek, CA 2.3 mi
94597 Walnut Creek, CA 2.8 mi
94507 Alamo, CA 2.9 mi
94518 Concord, CA 4.3 mi
94549 Lafayette, CA 4.6 mi
94523 Pleasant Hill, CA 5.0 mi
94575 Moraga, CA 5.2 mi
94528 Diablo, CA 5.4 mi
94556 Moraga, CA 5.5 mi

Find every ZIP code within 10 miles of 94596 →

Questions about this ZIP code

Where is ZIP code 94596?

94596 is in Walnut Creek, California, in Contra Costa County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.8890, -122.0368.

What county is 94596 in?

94596 lies in Contra Costa County.

What area code is 94596?

Walnut Creek uses area code 925, from NANPA's telephone records.

What time zone is 94596 in?

94596 uses America/Los_Angeles.

How many people live in 94596?

About 23,417 people live in ZIP code 94596, in 11,009 households, at 3,862.9 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 94596?

$135,635 a year, against $99,122 across California.

What ZIP codes are near 94596?

The closest are 94595 (2.1 mi), 94598 (2.3 mi), 94597 (2.8 mi), 94507 (2.9 mi) and 94518 (4.3 mi).

Is 94596 a PO Box ZIP code?

94596 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94596 ZIP Code — Walnut Creek, California (Contra Costa County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94596

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