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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/94542

94542

ZIP 94542 is in Hayward, California, in Alameda County; area codes 510 and 341; Pacific time. Hayward has 7 ZIP codes in all.

Type
Standard
Time zone
America/Los_Angeles
County
Alameda
Population
14,871
Coordinates
37.6553, -122.0258
☼ Live from 94542 — Hayward, CA

Weather right now

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Local time: —

Where 94542 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 94542
  • 🔢 Type 94542 into a pocket calculator and turn it upside down: ZhShG — not quite a word, sorry.
  • ➕ As a number, 94,542 = 2 × 3 × 7 × 2251. Its digits add up to 24, a total 2,425 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000101001110
  • 🏠 Its numerical neighbours: 94541 (Hayward, CA, 4 mi away) and 94543 (Hayward, CA, 3 mi away).
  • 🔄 Backwards, 94542 becomes 24549 — and that is a real ZIP code: Dry Fork, VA, 2,321 miles away.
  • 👥 26 other ZIP codes are made of exactly the same digits (24459, 24549, 24594, 24945, 24954, 29445, …). The farthest-flung twin is 29544 in Galivants Ferry, SC, 2,390 miles away.
  • 🧭 Farther south than 60% of all ZIP codes, and farther west than 96%.
  • 🎯1,269 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94542 and you would come out at 37.66°S, 57.97°E — 1,012 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 46m of daylight. Shortest: 9h 33m.
  • 📏 At 8.7 square miles of land, 94542 is bigger than 25% of ZIP codes — room for about 6.6 Central Parks.
🌙 The sky over 94542 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population14,871This ZIP14,871
Households4,936This ZIP4,936
Housing units5,201This ZIP5,201
Median age43.1This ZIP43.1California37.9US 38.9
Median household income$133,734This ZIP$133,734California$99,122US $80,734
Median home value$1,148,000This ZIP$1,148,000California$734,700US $332,700
Median gross rent$2,676This ZIP$2,676California$2,036US $1,413
Bachelor's degree or higher48.6%This ZIP48.6%
Mean commute35.4 minThis ZIP35.4 min
Population density1,719.0 / sq miThis ZIP1,719.0 / sq mi

Business and tax activity

Business establishments172This ZIP172
Employees2,216This ZIP2,216
Annual payroll$78,993,000This ZIP$78,993,000
Tax returns filed6,740This ZIP6,740
Total adjusted gross income$1,111,167,000This ZIP$1,111,167,000

Land area

Land area8.65 sq miThis ZIP8.65 sq mi
Water area0.00 sq mi

Other place names in 94542

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

ZIP codes near 94542

ZIPCityDistance
94544 Hayward, CA 2.3 mi
94543 Hayward, CA 3.1 mi
94541 Hayward, CA 3.6 mi
94552 Castro Valley, CA 3.6 mi
94587 Union City, CA 5.3 mi
94545 Hayward, CA 5.7 mi
94537 Fremont, CA 6.0 mi
94540 Hayward, CA 6.0 mi
94557 Hayward, CA 6.0 mi
94580 San Lorenzo, CA 6.1 mi

Find every ZIP code within 10 miles of 94542 →

Questions about this ZIP code

Where is ZIP code 94542?

94542 is in Hayward, California, in Alameda County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.6553, -122.0258.

What county is 94542 in?

94542 lies in Alameda County.

What area code is 94542?

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

What time zone is 94542 in?

94542 uses America/Los_Angeles.

How many people live in 94542?

About 14,871 people live in ZIP code 94542, in 4,936 households, at 1,719.0 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 94542?

$133,734 a year, against $99,122 across California.

What ZIP codes are near 94542?

The closest are 94544 (2.3 mi), 94543 (3.1 mi), 94541 (3.6 mi), 94552 (3.6 mi) and 94587 (5.3 mi).

Is 94542 a PO Box ZIP code?

94542 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94542 ZIP Code — Hayward, California (Alameda County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94542

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