Alameda County, California
49 ZIP codes · 737.46 sq mi of land · FIPS 06001
| Population | 1,649,473 |
|---|---|
| State | California |
| FIPS code | 06001 |
| Time zone | Pacific |
| Land area | 737.46 sq mi |
| Center (lat, long) | 37.6471, -121.9125 |
Area codes in this area
These are the area codes that most often serve Alameda County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
Oakland · 439,418Fremont · 228,295Hayward · 158,801Berkeley · 120,257Tracy · 96,966San Leandro · 87,826Livermore · 85,522Alameda · 77,238Pleasanton · 76,960Dublin · 70,803Union City · 67,464Castro Valley · 65,001Newark · 46,903San Lorenzo · 29,171Albany · 19,414SunolEmeryville
ZIP codes in Alameda County
94501 Alameda94502 Alameda94536 Fremont94538 Fremont94539 Fremont94541 Hayward94542 Hayward94544 Hayward94545 Hayward94546 Castro Valley94550 Livermore94551 Livermore94552 Castro Valley94555 Fremont94560 Newark94566 Pleasanton94568 Dublin94577 San Leandro94578 San Leandro94579 San Leandro94580 San Lorenzo94586 Sunol94587 Union City94588 Pleasanton94601 Oakland94602 Oakland94603 Oakland94605 Oakland94606 Oakland94607 Oakland94608 Emeryville94609 Oakland94610 Oakland94611 Oakland94612 Oakland94613 Oakland94618 Oakland94619 Oakland94621 Oakland94702 Berkeley94703 Berkeley94704 Berkeley94705 Berkeley94706 Albany94707 Berkeley94709 Berkeley94710 Berkeley94720 Berkeley95391 Tracy
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.