County ProfileCA
Alameda County
Population: 1,682,353 · 69 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
1,682,353
People
Median age
39
Housing
Total households
598,246
Income
Median household income
$129,367
Housing
Total housing units
637,212
Employment
Employment rate
63.2%
Education
Bachelor’s degree or higher
52.2%
Healthcare
Insured population
96%
County details
Local time 23:10:32(PT)| Name | Alameda |
|---|---|
| Total ZIP codes | 69total |
| ZIP codes (by type) | 49 Standard14 PO Box6 Unique |
| Area code | 341, 408, 510, 669, 925 |
| Timezone | Pacific Time (PT) |
| Coordinates | 37.6471385, -121.912488 |
| Land area | 737.5 sq miles(1,910 km²) |
Map of Alameda county, California with ZIP codes
Cities and Communities in Alameda County
Compare the largest cities in Alameda County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Oakland | 440,646 | $102,235 | 26ZIPs |
| Fremont | 230,504 | $175,816 | 5ZIPs |
| Hayward | 162,954 | $113,318 | 7ZIPs |
| Berkeley | 124,321 | $108,092 | 11ZIPs |
| San Leandro | 91,008 | $101,420 | 3ZIPs |
| Livermore | 87,955 | $160,775 | 2ZIPs |
| Pleasanton | 79,871 | $190,124 | 2ZIPs |
| Alameda | 78,280 | $137,697 | 2ZIPs |
| Dublin | 72,589 | $214,385 | 1ZIPs |
| Union City | 70,143 | $133,715 | 1ZIPs |
| Castro Valley | 66,441 | $142,779 | 2ZIPs |
| Newark | 47,529 | $169,064 | 1ZIPs |
| San Lorenzo | 29,581 | $112,660 | 1ZIPs |
| Albany | 20,271 | $144,107 | 1ZIPs |
| Emeryville | 12,905 | $117,092 | 2ZIPs |
| Piedmont | 11,270 | $250,001 | 1ZIPs |
| Sunol | 922 | $215,000 | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Alameda County
Review the most populated postal areas across Alameda County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 94544 | Hayward | $107,785 | 79,769 |
| 94536 | Fremont | $156,672 | 73,172 |
| 94568 | Dublin | $214,385 | 72,590 |
| 94587 | Union City | $133,715 | 70,121 |
| 94541 | Hayward | $105,729 | 69,736 |
| 94538 | Fremont | $144,451 | 66,424 |
| 94501 | Alameda | $127,906 | 64,116 |
| 94601 | Oakland | $66,651 | 54,166 |
| 94539 | Fremont | $235,399 | 54,026 |
| 94550 | Livermore | $180,295 | 49,959 |
| 94577 | San Leandro | $108,772 | 48,868 |
| 94560 | Newark | $169,064 | 47,533 |
| 94546 | Castro Valley | $128,385 | 46,687 |
| 94566 | Pleasanton | $191,155 | 45,055 |
| 94605 | Oakland | $101,043 | 44,294 |
| 94578 | San Leandro | $94,084 | 40,957 |
| 94606 | Oakland | $70,769 | 40,768 |
| 94551 | Livermore | $145,392 | 40,358 |
| 94611 | Oakland | $176,517 | 40,262 |
| 94555 | Fremont | $213,488 | 36,887 |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS