Data Last Updated: July 1, 2025

Alameda County, CA ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Alameda, CA.	73 ZIP Codes (49 General, 14 PO Box, 6 Unique, & 4 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Alameda, CA. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	341, 415, 510, 628, 925, 408, 650, 669
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Pacific
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Alameda, CA from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	1,682,353 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	06001
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	San Francisco-Oakland-Fremont, CA
Land Area: The approximate amount of land area covered by Alameda, CA in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	737 square miles
Water Area: The approximate amount of water area covered by Alameda, CA in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	84 square miles
Coordinates: The latitude/longitude centroid coordinates for Alameda County, CA.	-121.888701, 37.646862
Quick Link: Copy the direct link to the Alameda, CACounty page and use anywhere you like!	https://www.zip-codes.com/county/ca-alameda.asp

Alameda, CA ZIP Code Boundaries

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Alameda County, CA Covers 73 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 94501	General	Alameda	64,116	3.81%
ZIP Code 94502	General	Alameda	14,164	0.84%
ZIP Code 94505 *	General	Discovery Bay	15,445	--
ZIP Code 94514 *	General	Byron	1,248	--
ZIP Code 94536	General	Fremont	73,172	4.35%
ZIP Code 94537	P.O. Box	Fremont	0	0.00%
ZIP Code 94538	General	Fremont	66,424	3.95%
ZIP Code 94539	General	Fremont	54,026	3.21%
ZIP Code 94540	P.O. Box	Hayward	0	0.00%
ZIP Code 94541	General	Hayward	69,736	4.15%
ZIP Code 94542	General	Hayward	15,691	0.93%
ZIP Code 94543	P.O. Box	Hayward	0	0.00%
ZIP Code 94544	General	Hayward	79,769	4.74%
ZIP Code 94545	General	Hayward	33,786	2.01%
ZIP Code 94546	General	Castro Valley	46,687	2.78%
ZIP Code 94550	General	Livermore	49,959	2.97%
ZIP Code 94551	General	Livermore	40,358	2.40%
ZIP Code 94552	General	Castro Valley	14,721	0.88%
ZIP Code 94555	General	Fremont	36,887	2.19%
ZIP Code 94557	P.O. Box	Hayward	0	0.00%
ZIP Code 94560	General	Newark	47,533	2.83%
ZIP Code 94566	General	Pleasanton	45,055	2.68%
ZIP Code 94568	General	Dublin	72,590	4.31%
ZIP Code 94577	General	San Leandro	48,868	2.90%
ZIP Code 94578	General	San Leandro	40,957	2.43%
ZIP Code 94579	General	San Leandro	21,869	1.30%
ZIP Code 94580	General	San Lorenzo	29,590	1.76%
ZIP Code 94586	General	Sunol	943	0.06%
ZIP Code 94587	General	Union City	70,121	4.17%
ZIP Code 94588	General	Pleasanton	36,398	2.16%
ZIP Code 94601	General	Oakland	54,166	3.22%
ZIP Code 94602	General	Oakland	29,702	1.77%
ZIP Code 94603	General	Oakland	36,681	2.18%
ZIP Code 94604	P.O. Box	Oakland	0	0.00%
ZIP Code 94605	General	Oakland	44,294	2.63%
ZIP Code 94606	General	Oakland	40,768	2.42%
ZIP Code 94607	General	Oakland	31,067	1.85%
ZIP Code 94608	General	Emeryville	33,073	1.97%
ZIP Code 94609	General	Oakland	23,578	1.40%
ZIP Code 94610	General	Oakland	31,261	1.86%
ZIP Code 94611	General	Oakland	40,262	2.39%
ZIP Code 94612	General	Oakland	19,773	1.18%
ZIP Code 94613	P.O. Box	Oakland	346	0.02%
ZIP Code 94614	P.O. Box	Oakland	0	0.00%
ZIP Code 94615	General	Oakland	0	0.00%
ZIP Code 94617	General	Oakland	0	0.00%
ZIP Code 94618	General	Oakland	16,946	1.01%
ZIP Code 94619	General	Oakland	24,867	1.48%
ZIP Code 94620	P.O. Box	Piedmont	0	0.00%
ZIP Code 94621	General	Oakland	35,816	2.13%
ZIP Code 94623	P.O. Box	Oakland	0	0.00%
ZIP Code 94624	P.O. Box	Oakland	0	0.00%
ZIP Code 94649	Unique	Oakland	0	0.00%
ZIP Code 94661	P.O. Box	Oakland	0	0.00%
ZIP Code 94662	P.O. Box	Emeryville	0	0.00%
ZIP Code 94666	Unique	Oakland	0	0.00%
ZIP Code 94701	P.O. Box	Berkeley	0	0.00%
ZIP Code 94702	General	Berkeley	17,637	1.05%
ZIP Code 94703	General	Berkeley	20,805	1.24%
ZIP Code 94704	General	Berkeley	25,259	1.50%
ZIP Code 94705	General	Berkeley	13,591	0.81%
ZIP Code 94706	General	Albany	21,134	1.26%
ZIP Code 94707	General	Berkeley	12,781	0.76%
ZIP Code 94708	General	Berkeley	11,553	0.69%
ZIP Code 94709	General	Berkeley	12,514	0.74%
ZIP Code 94710	General	Berkeley	9,552	0.57%
ZIP Code 94712	P.O. Box	Berkeley	0	0.00%
ZIP Code 94720	Unique	Berkeley	7,478	0.44%
ZIP Code 95377 *	General	Tracy	34,590	--
ZIP Code 95391 *	General	Tracy	24,709	--

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Alameda, CA, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Alameda, CA Information

Alameda County, CA Covers 73 ZIP Codes. This includes 49 General ZIP Codes, 14 PO Box ZIP Codes, and 6 Unique (reserved for Business and Volume Mail Receivers). There are also 4 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Alameda County.

The population for Alameda County is 1,682,353, according to the U.S. Census. Population Density is 2,282.70 persons per square mile. With 621,958 Housing Units, the Average Household Size is 2.75 persons. There are 591,636 Family Households with an Average Family Size of 3.10 persons. 3.73% of the population is without Health Insurance. The 63.51% Employment Rate is 3.71% above the national average of 59.8%.1,189,902 people aged 25+ have some educational achievement, with 51.47% (or 612,435 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 8 area codes serving this area including341, 415, 510, 628, 925, 408, 650 and 669. Alameda is also located in the Pacific timezone and the current local time is shown above.

Alameda is part of the San Francisco-Oakland-Fremont, CA Core Based Statistical Area (CBSA). Its CBSA Code is 41860.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Alameda, CA have 623,980 Residential mailboxes and 52,180 Business mailboxes.There are 42,129 businesses with a total of 721,835 employees. That is an average of 17.1 employees per business. Annual payroll for these businesses is $69,668,187,000. Other Demographics

Alameda County Demographic Profile

Population & People

Total Population

1,682,353

Income

Median Household Income

$126,240

Housing

Total Housing Units

621,958

Health

Without Healthcare Coverage

3.73%

Business & Economy

Total Businesses

42,129

Families

Total Households

591,636

Employment

Employment Rate

63.51%

Education

Bachelor's Degree or Higher

51.47%

Total Population: Total number of people from the 2020 U.S. Census for Alameda, CA. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	1,682,353
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Alameda, CA. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	1,711,717
Total Households: Total number of Households from the 2020 U.S. Census for Alameda, CA. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	591,636
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	621,958
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.75
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.10

Other Alameda Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	623,980
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	52,180
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	761,498
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	366,509
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	192,340

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	42,129
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$17,351,520,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$69,668,187,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	721,835

Sum of all ZIP Codes assigned Alameda, CA as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov