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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/94577

94577

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

Type
Standard
Time zone
America/Los_Angeles
County
Alameda
Population
46,317
Coordinates
37.7167, -122.1693
☼ Live from 94577 — San Leandro, CA

Weather right now

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Local time: —

Where 94577 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 94577
  • 🔢 Type 94577 into a pocket calculator and turn it upside down: LLShG — not quite a word, sorry.
  • ➕ As a number, 94,577 = 7 × 59 × 229. Its digits add up to 32, a total 644 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000101110001
  • 🏠 Its numerical neighbours: 94576 (Deer Park, CA, 60 mi away) and 94578 (San Leandro, CA, 2 mi away).
  • 🔄 Backwards, 94577 becomes 77549 — and that is a real ZIP code: Friendswood, TX, 1,644 miles away.
  • 👥 28 other ZIP codes are made of exactly the same digits (45779, 47579, 47597, 47957, 47975, 49757, …). The farthest-flung twin is 45779 in Syracuse, OH, 2,162 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 94577 and you would come out at 37.72°S, 57.83°E — 1,013 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 33m.
  • 📏 At 8.1 square miles of land, 94577 is bigger than 24% of ZIP codes — room for about 6.2 Central Parks.
🌙 The sky over 94577 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population46,317This ZIP46,317
Households16,555This ZIP16,555
Housing units17,494This ZIP17,494
Median age41.3This ZIP41.3California37.9US 38.9
Median household income$108,772This ZIP$108,772California$99,122US $80,734
Median home value$856,100This ZIP$856,100California$734,700US $332,700
Median gross rent$2,242This ZIP$2,242California$2,036US $1,413
Bachelor's degree or higher38.5%This ZIP38.5%
Mean commute30.7 minThis ZIP30.7 min
Population density5,707.6 / sq miThis ZIP5,707.6 / sq mi

Business and tax activity

Business establishments1,821This ZIP1,821
Employees38,477This ZIP38,477
Annual payroll$3,038,310,000This ZIP$3,038,310,000
Tax returns filed23,710This ZIP23,710
Total adjusted gross income$2,129,389,000This ZIP$2,129,389,000

Land area

Land area8.12 sq miThis ZIP8.12 sq mi
Water area0.71 sq miThis ZIP0.71 sq mi

Other place names in 94577

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

ZIP codes near 94577

ZIPCityDistance
94603 Oakland, CA 1.6 mi
94614 Oakland, CA 2.1 mi
94579 San Leandro, CA 2.2 mi
94578 San Leandro, CA 2.5 mi
94605 Oakland, CA 3.3 mi
94621 Oakland, CA 3.3 mi
94580 San Lorenzo, CA 3.3 mi
94546 Castro Valley, CA 4.1 mi
94502 Alameda, CA 4.1 mi
94613 Oakland, CA 4.5 mi

Find every ZIP code within 10 miles of 94577 →

Questions about this ZIP code

Where is ZIP code 94577?

94577 is in San Leandro, California, in Alameda County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.7167, -122.1693.

What county is 94577 in?

94577 lies in Alameda County.

What area code is 94577?

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

What time zone is 94577 in?

94577 uses America/Los_Angeles.

How many people live in 94577?

About 46,317 people live in ZIP code 94577, in 16,555 households, at 5,707.6 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 94577?

$108,772 a year, against $99,122 across California.

What ZIP codes are near 94577?

The closest are 94603 (1.6 mi), 94614 (2.1 mi), 94579 (2.2 mi), 94578 (2.5 mi) and 94605 (3.3 mi).

Is 94577 a PO Box ZIP code?

94577 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “94577 ZIP Code — San Leandro, California (Alameda County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94577

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