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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/94579

94579

ZIP 94579 is in San Leandro, California, in Alameda County; area codes 510 and 341; Pacific time. San Leandro has 3 ZIP codes; the others are 94577 and 94578.

Type
Standard
Time zone
America/Los_Angeles
County
Alameda
Population
20,017
Coordinates
37.6865, -122.1572
☼ Live from 94579 — San Leandro, CA

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Local time: —

Where 94579 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 94579
  • 🔢 Type 94579 into a pocket calculator and turn it upside down: GLShG — not quite a word, sorry.
  • ➕ As a number, 94,579 = 271 × 349. Its digits add up to 34, a total 322 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000101110011
  • 🏠 Its numerical neighbours: 94578 (San Leandro, CA, 2 mi away) and 94580 (San Lorenzo, CA, 1 mi away).
  • 🔄 Backwards, 94579 becomes 97549, which is not a ZIP code at all.
  • 👥 24 other ZIP codes are made of exactly the same digits (47959, 47995, 49759, 49795, 54979, 59479, …). The farthest-flung twin is 99547 in Atka, AK, 2,668 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 94579 and you would come out at 37.69°S, 57.84°E — 1,014 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 3.1 square miles of land, 94579 is bigger than 15% of ZIP codes — room for about 2.4 Central Parks.
🌙 The sky over 94579 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population20,017This ZIP20,017
Households6,628This ZIP6,628
Housing units6,850This ZIP6,850
Median age45.9This ZIP45.9California37.9US 38.9
Median household income$99,040This ZIP$99,040California$99,122US $80,734
Median home value$850,300This ZIP$850,300California$734,700US $332,700
Median gross rent$2,139This ZIP$2,139California$2,036US $1,413
Bachelor's degree or higher28.0%This ZIP28.0%
Mean commute31.5 minThis ZIP31.5 min
Population density6,399.3 / sq miThis ZIP6,399.3 / sq mi

Business and tax activity

Business establishments246This ZIP246
Employees2,224This ZIP2,224
Annual payroll$89,126,000This ZIP$89,126,000
Tax returns filed11,190This ZIP11,190
Total adjusted gross income$892,108,000This ZIP$892,108,000

Land area

Land area3.13 sq miThis ZIP3.13 sq mi
Water area0.00 sq mi

Other place names in 94579

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

ZIP codes near 94579

ZIPCityDistance
94580 San Lorenzo, CA 1.4 mi
94577 San Leandro, CA 2.2 mi
94578 San Leandro, CA 2.2 mi
94603 Oakland, CA 3.8 mi
94614 Oakland, CA 3.8 mi
94541 Hayward, CA 3.9 mi
94545 Hayward, CA 4.3 mi
94543 Hayward, CA 4.4 mi
94546 Castro Valley, CA 5.0 mi
94605 Oakland, CA 5.2 mi

Find every ZIP code within 10 miles of 94579 →

Questions about this ZIP code

Where is ZIP code 94579?

94579 is in San Leandro, California, in Alameda County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.6865, -122.1572.

What county is 94579 in?

94579 lies in Alameda County.

What area code is 94579?

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

What time zone is 94579 in?

94579 uses America/Los_Angeles.

How many people live in 94579?

About 20,017 people live in ZIP code 94579, in 6,628 households, at 6,399.3 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 94579?

$99,040 a year, against $99,122 across California.

What ZIP codes are near 94579?

The closest are 94580 (1.4 mi), 94577 (2.2 mi), 94578 (2.2 mi), 94603 (3.8 mi) and 94614 (3.8 mi).

Is 94579 a PO Box ZIP code?

94579 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94579 ZIP Code — San Leandro, California (Alameda County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94579

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