ZIP codes in Alameda County, California

Alameda County, California has 69 ZIP codes in this list, from 94501 to 94720. They cover 17 places, among them Oakland, Berkeley, Hayward and Fremont.

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ZIP code	Place	Land area (sq mi)	Map point
94501	Alameda	7.9	37.771, -122.265
94502	Alameda	2.5	37.735, -122.243
94536	Fremont	14.1	37.560, -122.000
94537	Fremont	no area	37.680, -121.921
94538	Fremont	16.5	37.531, -121.971
94539	Fremont	25.1	37.518, -121.929
94540	Hayward	no area	37.680, -121.921
94541	Hayward	7.5	37.674, -122.089
94542	Hayward	8.7	37.659, -122.047
94543	Hayward	no area	37.669, -122.081
94544	Hayward	11.0	37.637, -122.067
94545	Hayward	14.5	37.633, -122.097
94546	Castro Valley	16.0	37.702, -122.078
94550	Livermore	272	37.683, -121.763
94551	Livermore	82.7	37.753, -121.770
94552	Castro Valley	51.8	37.713, -122.038
94555	Fremont	13.9	37.574, -122.047
94557	Hayward	no area	37.680, -121.921
94560	Newark	20.1	37.537, -122.032
94566	Pleasanton	20.3	37.666, -121.876
94568	Dublin	16.5	37.717, -121.923
94577	San Leandro	8.1	37.721, -122.159
94578	San Leandro	4.6	37.702, -122.124
94579	San Leandro	3.1	37.689, -122.151
94580	San Lorenzo	3.3	37.679, -122.129
94586	Sunol	55.7	37.609, -121.899
94587	Union City	19.6	37.590, -122.050
94588	Pleasanton	32.7	37.687, -121.896
94601	Oakland	3.2	37.781, -122.217
94602	Oakland	3.6	37.801, -122.210
94603	Oakland	2.7	37.740, -122.171
94604	Oakland	no area	37.804, -122.271
94605	Oakland	8.8	37.764, -122.163
94606	Oakland	2.3	37.796, -122.243
94607	Oakland	5.9	37.807, -122.285
94608	Emeryville	2.8	37.837, -122.280
94609	Oakland	1.7	37.836, -122.264
94610	Oakland	2.1	37.813, -122.244
94611	Oakland	7.3	37.847, -122.222
94612	Oakland	1.0	37.809, -122.267
94613	Oakland	0.2	37.781, -122.187
94614	Oakland	no area	37.728, -122.205
94615	Oakland	no area	37.807, -122.300
94617	Oakland	no area	37.808, -122.272
94618	Oakland	2.4	37.843, -122.240
94619	Oakland	8.3	37.788, -122.188
94620	Piedmont	no area	37.824, -122.232
94621	Oakland	8.5	37.759, -122.185
94622	Oakland	no area	37.799, -122.234
94623	Oakland	no area	37.804, -122.271
94624	Oakland	no area	37.804, -122.271
94649	Oakland	no area	37.804, -122.271
94659	Oakland	no area	37.804, -122.271
94660	Oakland	no area	37.804, -122.271
94661	Oakland	no area	37.804, -122.271
94662	Emeryville	no area	37.831, -122.285
94666	Oakland	no area	37.804, -122.271
94701	Berkeley	no area	37.861, -122.297
94702	Berkeley	1.3	37.866, -122.285
94703	Berkeley	1.3	37.863, -122.275
94704	Berkeley	0.9	37.866, -122.257
94705	Berkeley	3.4	37.857, -122.250
94706	Albany	1.5	37.890, -122.295
94707	Berkeley	1.8	37.893, -122.276
94708	Berkeley	3.3	37.892, -122.260
94709	Berkeley	0.7	37.878, -122.266
94710	Berkeley	2.2	37.870, -122.296
94712	Berkeley	no area	37.872, -122.273
94720	Berkeley	0.7	37.874, -122.255

The ZIP code areas of Alameda County add up to about 806 square miles of land (2,087 sq km) as the Census Bureau draws them. The largest is 94550 (Livermore), with 272 square miles.

Places with more than one code here: Oakland (26 codes), Berkeley (11 codes), Hayward (7 codes).

Using these codes

In an address, the ZIP code comes last, after the city and the two-letter state: Alameda, CA 94501.
Tap a ZIP code to open it in the look-up, with a copy button for the address line.
A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
"No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.

Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.

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