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/94505

94505

ZIP 94505 is Discovery Bay, California, mostly in Contra Costa County; area codes 209 and 350; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Contra Costa +2 more
Population
14,970
Coordinates
37.8713, -121.5970
☼ Live from 94505 — Discovery Bay, CA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 94505 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 94505
  • 🔢 Type 94505 into a pocket calculator and turn it upside down: SOShG — not quite a word, sorry.
  • ➕ As a number, 94,505 = 5 × 41 × 461. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000100101001
  • 🏠 Its numerical neighbours: 94503 (American Canyon, CA, 41 mi away) and 94506 (Danville, CA, 17 mi away).
  • 🔄 Backwards, 94505 becomes 50549, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (04955, 05459, 05495, 40955, 49055, 49505, …). The farthest-flung twin is 04955 in New Sharon, ME, 2,675 miles away.
  • 🧭 Farther south than 59% of all ZIP codes, and farther west than 95%.
  • 🎯1,242 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94505 and you would come out at 37.87°S, 58.40°E — 987 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 32m.
  • 📏 At 16.7 square miles of land, 94505 is bigger than 34% of ZIP codes — room for about 13 Central Parks.
🌙 The sky over 94505 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population14,970This ZIP14,970
Households5,446This ZIP5,446
Housing units6,092This ZIP6,092
Median age45.8This ZIP45.8California37.9US 38.9
Median household income$146,480This ZIP$146,480California$99,122US $80,734
Median home value$830,500This ZIP$830,500California$734,700US $332,700
Median gross rent$3,029This ZIP$3,029California$2,036US $1,413
Bachelor's degree or higher32.6%This ZIP32.6%
Mean commute44.1 minThis ZIP44.1 min
Population density897.9 / sq miThis ZIP897.9 / sq mi

Business and tax activity

Business establishments199This ZIP199
Employees1,170This ZIP1,170
Annual payroll$66,923,000This ZIP$66,923,000
Tax returns filed7,150This ZIP7,150
Total adjusted gross income$989,942,000This ZIP$989,942,000

Land area

Land area16.67 sq miThis ZIP16.67 sq mi
Water area5.79 sq miThis ZIP5.79 sq mi

Counties 94505 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Contra Costa County 96.0%
Alameda County 3.9%
San Joaquin County 0.1%

Other place names in 94505

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

ZIP codes near 94505

ZIPCityDistance
94514 Byron, CA 3.8 mi
94513 Brentwood, CA 6.1 mi
95391 Tracy, CA 6.3 mi
94548 Knightsen, CA 7.7 mi
95208 Stockton, CA 9.7 mi
94561 Oakley, CA 9.9 mi
95234 Holt, CA 10.3 mi
94511 Bethel Island, CA 11.0 mi
95206 Stockton, CA 11.3 mi
94531 Antioch, CA 11.5 mi

Find every ZIP code within 10 miles of 94505 →

Questions about this ZIP code

Where is ZIP code 94505?

94505 is in Discovery Bay, California, in Contra Costa County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.8713, -121.5970.

What county is 94505 in?

94505 spans 3 counties: Contra Costa County, Alameda County and San Joaquin County. Most of it falls in Contra Costa County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 94505?

Discovery Bay uses area codes 209 and 350, from NANPA's telephone records.

What time zone is 94505 in?

94505 uses America/Los_Angeles.

How many people live in 94505?

About 14,970 people live in ZIP code 94505, in 5,446 households, at 897.9 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 94505?

$146,480 a year, against $99,122 across California.

What ZIP codes are near 94505?

The closest are 94514 (3.8 mi), 94513 (6.1 mi), 95391 (6.3 mi), 94548 (7.7 mi) and 95208 (9.7 mi).

Is 94505 a PO Box ZIP code?

94505 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “94505 ZIP Code — Discovery Bay, California (Contra Costa County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94505

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94505.json

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