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 — STATE/CA/COUNTY/ALAMEDA

Alameda County, CA ZIP codes

There are 69 ZIP codes in Alameda County, CA, in 18 towns, from 94501 to 95391. The largest are 94544 (Hayward), 94587 (Union City) and 94536 (Fremont).

The county seat is Oakland.

ZIP codes
69
Towns
18
County seat
Oakland
County FIPS
06001
Population
1,649,473
Median household income
$129,367
Land area
737 sq mi
Area codes
341, 350, 510, 925

Alameda County ZIP codes by town

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Alameda County ZIP codes

945019450294536945379453894539945409454194542945439454494545945469455094551945529455594557945609456694568945779457894579945809458694587945889460194602946039460494605946069460794608946099461094611946129461394614946159461794618946199462094621946229462394624946499465994660946619466294666947019470294703947049470594706947079470994710947129472095391

The ZIP codes of Alameda County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Alameda County in numbers

About 1,649,473 people live in Alameda County, in 598,246 households, the 7th most populous of California's 58 counties. The median household income is $129,367 a year, 31% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $1,090,100 (48% above the California median), and median gross rent is $2,357 a month. The median age is 39.0; 52.2% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 31 minutes.

Population1,649,473Alameda1,649,473
Households598,246Alameda598,246
Median age39.0Alameda39.0California37.9US 38.9
Median household income$129,367Alameda$129,367California$99,122US $80,734
Median home value$1,090,100Alameda$1,090,100California$734,700US $332,700
Median gross rent$2,357Alameda$2,357California$2,036US $1,413
Bachelor's degree or higher52.2%Alameda52.2%California37.1%US 35.7%
Mean commute31.0 minAlameda31.0 minCalifornia28.7 minUS 26.4 min
Population density2,237 / sq miAlameda2,237 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Alameda County

Largest towns in Alameda County
TownZIP codesPopulation
Oakland 26 439,418
Fremont 5 228,295
Hayward 7 158,801
Berkeley 10 120,257
Tracy 1 96,966
San Leandro 3 87,826
Livermore 2 85,522
Alameda 2 77,238
Pleasanton 2 76,960
Dublin 1 70,803
Union City 1 67,464
Castro Valley 2 65,001
Newark 1 46,903
San Lorenzo 1 29,171
Albany 1 19,414

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Alameda County.

Not sure you are in Alameda County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Alameda County, with figures

ZIP codes in Alameda County
ZIP City Type Population Median income Median home
94501 Alameda , CA Standard 63,808 $127,906 $1,250,300
94502 Alameda , CA Standard 13,430 $180,938 $1,204,200
94536 Fremont , CA Standard 70,619 $167,662 $1,287,800
94537 Fremont , CA No street area — — —
94538 Fremont , CA Standard 67,781 $147,301 $1,136,600
94539 Fremont , CA Standard 52,396 $243,552 $1,950,900
94540 Hayward , CA No street area — — —
94541 Hayward , CA Standard 67,139 $105,729 $812,000
94542 Hayward , CA Standard 14,871 $133,734 $1,148,000
94543 Hayward , CA No street area — — —
94544 Hayward , CA Standard 76,947 $107,785 $827,200
94545 Hayward , CA Standard 32,843 $114,356 $879,400
94546 Castro Valley , CA Standard 44,855 $128,385 $1,043,500
94550 Livermore , CA Standard 49,873 $180,295 $1,202,500
94551 Livermore , CA Standard 37,885 $145,392 $978,500
94552 Castro Valley , CA Standard 14,506 $212,605 $1,394,300
94555 Fremont , CA Standard 37,501 $219,938 $1,376,600
94557 Hayward , CA No street area — — —
94560 Newark , CA Standard 46,903 $169,064 $1,142,800
94566 Pleasanton , CA Standard 44,222 $191,155 $1,656,900
94568 Dublin , CA Standard 70,803 $214,385 $1,317,100
94577 San Leandro , CA Standard 46,317 $108,772 $856,100
94578 San Leandro , CA Standard 41,769 $94,084 $823,000
94579 San Leandro , CA Standard 20,017 $99,040 $850,300
94580 San Lorenzo , CA Standard 29,420 $110,729 $846,700
94586 Sunol , CA Standard 971 $204,931 $1,511,000
94587 Union City , CA Standard 67,464 $133,715 $1,104,900
94588 Pleasanton , CA Standard 34,328 $191,073 $1,384,300
94601 Oakland , CA Standard 53,259 $72,359 $710,000
94602 Oakland , CA Standard 31,759 $122,263 $1,129,500
94603 Oakland , CA Standard 35,742 $76,723 $614,700
94604 Oakland , CA No street area — — —
94605 Oakland , CA Standard 44,103 $106,068 $849,300
94606 Oakland , CA Standard 39,966 $72,470 $802,700
94607 Oakland , CA Standard 28,804 $94,863 $720,600
94608 Emeryville , CA Standard 34,395 $120,239 $849,600
94609 Oakland , CA Standard 23,928 $107,834 $1,207,700
94610 Oakland , CA Standard 32,628 $134,507 $1,379,700
94611 Oakland , CA Standard 40,116 $180,549 $1,537,700
94612 Oakland , CA Standard 18,175 $74,037 $827,800
94613 Oakland , CA Standard 472 — —
94614 Oakland , CA No street area — — —
94615 Oakland , CA No street area — — —
94617 Oakland , CA No street area — — —
94618 Oakland , CA Standard 16,958 $201,780 $1,753,100
94619 Oakland , CA Standard 26,831 $129,867 $1,025,300
94620 Piedmont , CA No street area — — —
94621 Oakland , CA Standard 33,840 $52,049 $543,700
94622 Oakland , CA No street area — — —
94623 Oakland , CA No street area — — —
94624 Oakland , CA No street area — — —
94649 Oakland , CA No street area — — —
94659 Oakland , CA No street area — — —
94660 Oakland , CA No street area — — —
94661 Oakland , CA No street area — — —
94662 Emeryville , CA No street area — — —
94666 Oakland , CA No street area — — —
94701 Berkeley , CA No street area — — —
94702 Berkeley , CA Standard 17,635 $99,775 $1,202,100
94703 Berkeley , CA Standard 20,934 $109,881 $1,359,000
94704 Berkeley , CA Standard 23,788 $50,129 $906,100
94705 Berkeley , CA Standard 13,991 $167,970 $1,992,800
94706 Albany , CA Standard 19,969 $143,398 $1,203,500
94707 Berkeley , CA Standard 12,811 $212,776 $1,649,300
94709 Berkeley , CA Standard 12,146 $89,054 $1,375,000
94710 Berkeley , CA Standard 8,380 $102,227 $1,081,000
94712 Berkeley , CA No street area — — —
94720 Berkeley , CA Standard 5,763 — $507,800
95391 Tracy , CA Standard 25,574 $176,952 $947,000

Cite this page

zipcodes.pro. “Alameda County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ca/county/alameda

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