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/94523

94523

ZIP 94523 is Pleasant Hill, California, in Contra Costa County; area code 925; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Contra Costa
Population
34,592
Coordinates
37.9542, -122.0758
☼ Live from 94523 — Pleasant Hill, CA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 94523 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 94523
  • 🔢 Type 94523 into a pocket calculator and turn it upside down: EZShG — not quite a word, sorry.
  • ➕ As a number, 94,523 = 11 × 13 × 661. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000100111011
  • 🏠 Its numerical neighbours: 94522 (Concord, CA, 3 mi away) and 94524 (Concord, CA, 3 mi away).
  • 🔄 Backwards, 94523 becomes 32549 — and that is a real ZIP code: Fort Walton Beach, FL, 2,079 miles away.
  • 👥 48 other ZIP codes are made of exactly the same digits (23459, 23954, 24539, 24593, 24935, 25943, …). The farthest-flung twin is 34952 in Port Saint Lucie, FL, 2,517 miles away.
  • 🧭 Farther south than 58% of all ZIP codes, and farther west than 96%.
  • 🎯1,267 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94523 and you would come out at 37.95°S, 57.92°E — 996 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 7.2 square miles of land, 94523 is bigger than 23% of ZIP codes — room for about 5.5 Central Parks.
🌙 The sky over 94523 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population34,592This ZIP34,592
Households13,452This ZIP13,452
Housing units14,133This ZIP14,133
Median age42.0This ZIP42.0California37.9US 38.9
Median household income$142,586This ZIP$142,586California$99,122US $80,734
Median home value$1,076,600This ZIP$1,076,600California$734,700US $332,700
Median gross rent$2,501This ZIP$2,501California$2,036US $1,413
Bachelor's degree or higher55.1%This ZIP55.1%
Mean commute30.3 minThis ZIP30.3 min
Population density4,800.4 / sq miThis ZIP4,800.4 / sq mi

Business and tax activity

Business establishments1,135This ZIP1,135
Employees13,469This ZIP13,469
Annual payroll$678,990,000This ZIP$678,990,000
Tax returns filed16,940This ZIP16,940
Total adjusted gross income$2,340,862,000This ZIP$2,340,862,000

Land area

Land area7.21 sq miThis ZIP7.21 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 94523

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

ZIP codes near 94523

ZIPCityDistance
94597 Walnut Creek, CA 2.5 mi
94518 Concord, CA 2.9 mi
94522 Concord, CA 2.9 mi
94524 Concord, CA 2.9 mi
94529 Concord, CA 2.9 mi
94520 Concord, CA 3.5 mi
94519 Concord, CA 4.2 mi
94598 Walnut Creek, CA 4.2 mi
94549 Lafayette, CA 4.4 mi
94553 Martinez, CA 4.7 mi

Find every ZIP code within 10 miles of 94523 →

Questions about this ZIP code

Where is ZIP code 94523?

94523 is in Pleasant Hill, California, in Contra Costa County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.9542, -122.0758.

What county is 94523 in?

94523 lies in Contra Costa County.

What area code is 94523?

Pleasant Hill uses area code 925, from NANPA's telephone records.

What time zone is 94523 in?

94523 uses America/Los_Angeles.

How many people live in 94523?

About 34,592 people live in ZIP code 94523, in 13,452 households, at 4,800.4 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 94523?

$142,586 a year, against $99,122 across California.

What ZIP codes are near 94523?

The closest are 94597 (2.5 mi), 94518 (2.9 mi), 94522 (2.9 mi), 94524 (2.9 mi) and 94529 (2.9 mi).

Is 94523 a PO Box ZIP code?

94523 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “94523 ZIP Code — Pleasant Hill, California (Contra Costa County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94523

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94523.json

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