Castro Valley ZIP Code List — Alameda County, CA

There are 2 unique ZIP codes in Castro Valley, California. Area code: 510/341.

ZIP codes

67.76

sq mi land

1.55

sq mi water

510/341

area code

Castro Valley, CA ZIP code map

About Castro Valley, CA

Castro Valley, California, is a vibrant suburban community located in Alameda County. Known for its scenic hills and a mix of urban and suburban living, Castro Valley offers a unique blend of outdoor recreation and residential life. The city is characterized by a diverse population and a welcoming atmosphere, making it an attractive place for families and professionals alike.

Location & geography

Castro Valley is situated in the eastern part of the San Francisco Bay Area, surrounded by picturesque hills and valleys. Nearby cities include Hayward to the northwest, San Leandro to the west, and Dublin located about 10 miles to the east. The total land area of Castro Valley is 135.51 square miles, complemented by a water area of 3.11 square miles, which offers opportunities for various outdoor activities.

Community & economy

The community of Castro Valley reflects a mix of cultures and backgrounds, contributing to its rich character and vibrant local events throughout the year. The local economy is supported by various industries, including retail, healthcare, and education, providing ample employment opportunities for residents. Daily life in Castro Valley typically includes visits to local parks, engaging in community events, and enjoying the diverse dining scene.

Transportation

Castro Valley is easily accessible via major highways, including Interstate 580, which connects the city to the broader Bay Area. The nearest airport is Oakland International Airport, located about 11 miles to the west, offering domestic and international flights. Public transportation options are available, including bus services that connect residents to nearby cities.

History

Castro Valley was founded in the mid-1800s, beginning as a farming community and gradually developing into a suburban area. Key industries in the area historically centered around agriculture and transportation, which helped define the early economic landscape of the city. Notable events include the establishment of local parks and community initiatives aimed at enhancing the quality of life for its residents.

Did you know?

One surprising fact about Castro Valley is that it has a notable active community theater, which offers a variety of performances throughout the year. Additionally, the city is home to beautiful parks and trails, making it a hidden gem for outdoor enthusiasts.

ZIP codes for Castro Valley, CA (2)

ZIP code	City	County	Map
94546	Castro Valley	Alameda	View map
94552	Castro Valley	Alameda	View map

Demographics & statistics

60,709

Population

43.9

Median age

$139,095

Median household income

$58,896

Per capita income

$1,082,200

Median home value

$2,936

Median monthly rent

79.1%

Home ownership

6.3%

Poverty rate

4.1%

Unemployment

15,672

Housing units

50.1%

Bachelor's or higher

Age distribution

Male Female

1,377

Under 5

1,485

1,824

5–9

1,966

1,694

10–14

1,827

1,712

15–19

1,845

1,161

20–24

1,252

3,013

25–34

3,248

4,553

35–44

4,908

3,936

45–54

4,244

2,155

55–59

2,323

2,312

60–64

2,492

3,292

65–74

3,550

1,469

75–84

1,584

716

85+

771

← Male

Female →

Age summary

Group	Count	%
Under 18	12,793	20.8%
18 and over	47,916	79.2%
65 and over	11,382	19.1%
Median age	43.9 years

Race & ethnicity

White 40.1%

Asian 28.5%

Two or more races 10.8%

Hispanic or Latino 9.8%

Black or African American 5.4%

Other race 4.4%

American Indian / Alaska Native 0.9%

Native Hawaiian / Pacific Islander 0.2%

Group	Count	%
White	27,006	40.1%
Asian	19,201	28.5%
Two or more races	7,242	10.8%
Hispanic or Latino	6,570	9.8%
Black or African American	3,610	5.4%
Other race	2,931	4.4%
American Indian / Alaska Native	577	0.9%
Native Hawaiian / Pacific Islander	142	0.2%

Household income

Under $10k 4.0%

$10k–$15k 1.2%

$15k–$25k 2.6%

$25k–$35k 3.5%

$35k–$50k 4.2%

$50k–$75k 7.2%

$75k–$100k 8.5%

$100k–$150k 17.4%

$150k–$200k 13.5%

$200k+ 37.9%

Range	% of households
Under $10k	4.0%
$10k–$15k	1.2%
$15k–$25k	2.6%
$25k–$35k	3.5%
$35k–$50k	4.2%
$50k–$75k	7.2%
$75k–$100k	8.5%
$100k–$150k	17.4%
$150k–$200k	13.5%
$200k+	37.9%
Median income	$139,095

Housing

Home values

Under $50k 1.2%

$50k–$100k 1.3%

$100k–$150k 1.2%

$150k–$200k 0.2%

$200k–$300k 0.4%

$300k–$500k 1.6%

$500k–$1M 34.0%

$1M+ 60.3%

Housing overview

Metric	Value
Median home value	$1,082,200
Median rent / month	$2,936
Owner occupied	79.1%
Renter occupied	20.9%
Vacant	2.4%
Single-family detached	74.9%
Large apartment buildings	5.6%
Mobile homes	0.9%
Median rooms	6.2
Avg household size (owned)	2.96

Year built

Era	%
2020 or later	0.1%
2010–2019	0.8%
2000–2009	4.2%
1990–1999	22.9%
1980–1989	19.1%
1970–1979	12.6%
1960–1969	12.6%
1950–1959	16.8%
1940–1949	8.1%
1939 or earlier	3.0%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	3.7%
2 bedrooms	20.6%
3 bedrooms	31.2%
4 bedrooms	36.0%
5+ bedrooms	7.6%

Vehicles per household

Vehicles	% of households
No vehicle	3.3%
1 vehicle	19.5%
2 vehicles	42.3%
3 or more	35.1%

Heating fuel

Fuel type	%
Utility gas	74.1%
Electricity	19.3%
Propane / LP gas	3.7%
Fuel oil	0.1%
Wood	0.4%
Solar	1.0%
No fuel used	0.6%

Households & families

Household type	Count	%
Married-couple family	12,580	64.8%
Cohabiting couple	1,299	5.4%
Male householder, no spouse	2,465	9.9%
Female householder, no spouse	4,546	20.1%
Households with children under 18	7,358	35.1%
Households with seniors (65+)	7,637	36.6%
Average household size	2.91

Marital status

Status	Male	Female
Never married	29.1%	27.5%
Married	61.5%	53.8%
Separated	1.3%	1.5%
Widowed	2.4%	9.7%
Divorced	5.7%	7.6%

Education

Less than 9th grade 4.2%

Some HS, no diploma 2.9%

HS graduate 14.8%

Some college, no degree 17.5%

Associate's degree 10.6%

Bachelor's degree 29.6%

Graduate / professional 20.6%

Metric	%
HS diploma or higher	92.9%
Bachelor's or higher	50.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	791	5.0%
Kindergarten	737	4.2%
Elementary school	5,490	38.9%
High school	3,564	25.4%
College / grad school	3,721	26.5%

Employment

Industry of employment

Education & healthcare 23.6%

Professional & management 17.2%

Retail trade 10.7%

Manufacturing 7.6%

Transportation & utilities 7.4%

Finance & real estate 6.9%

Arts, food & hospitality 6.1%

Construction 6.0%

Public administration 5.3%

Other services 3.7%

Information 3.4%

Wholesale trade 2.0%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	56.7%
Service	12.0%
Sales & office	18.3%
Natural resources & construction	6.7%
Production & transportation	6.5%

Employment type

Type	%
Private sector	77.7%
Government	15.5%
Self-employed	6.8%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	65.5%
Carpool	7.7%
Public transit	5.7%
Walk	1.2%
Other means	1.2%
Avg commute (minutes)	34.1

Poverty

All people 6.3%

Under 18 years 6.6%

18 and over 6.3%

Married-couple families 2.2%

Female-led households 18.9%

Income support

Source	% of households
Social Security	31.6%
Retirement income	28.1%
Supplemental Security	5.4%
Cash public assistance	1.8%
Food stamps / SNAP	4.0%

Health indicators

Condition	%
High blood pressure	26.7%
High cholesterol	31.1%
Heart disease	4.8%
Stroke	2.3%
Asthma	8.6%
Arthritis	19.2%
Kidney disease	2.4%
Pulmonary disease	4.5%
Cancer	6.1%

Behavior / access	%
Binge drinking	15.6%
No physical activity	15.5%
Less than 7 hrs sleep	28.0%
Fair or poor health	10.4%
Poor mental health	12.1%
Poor physical health	7.8%
No health insurance	8.1%
Visited doctor (checkup)	67.1%
Visited dentist	68.7%
Cholesterol screening	93.5%
Teeth loss	7.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,340	4.3%

Disability	%
Any disability	8.5%
Under 18	2.9%
18–64 years	6.3%
65 and over	22.1%

Health insurance coverage

Type	%
Private insurance	82.1%
Public insurance	27.3%
Uninsured under 19	4.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	57,847	95.8%
Spanish	8,614	14.0%
Other Indo-European	1,410	1.9%
Asian & Pacific Islander	912	1.6%
Other languages	5,859	9.9%

Place of birth & citizenship

Origin	Count	%
Native born (US)	44,219	71.6%
Born in same state	43,358	70.1%
Born in different state	35,842	56.6%
Foreign born	861	1.6%
Naturalized citizen	16,490	28.5%
Not a US citizen	11,710	75.0%

Ancestry

Ancestry	Count	%
Italian	4,364	7.2%
French	4,245	7%
Arab	1,581	2.6%
Polish	634	1%
English	369	0.6%

Ancestry	Count	%
Dutch	296	0.5%
Norwegian	100	0.2%
Irish	98	0.2%
German	90	0.1%

Technology access

Metric	% of households
Computer access	34.1%
Internet access	98.2%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Castro Valley, CA have?

Castro Valley, CA has 2 ZIP codes: 94546, 94552. Each ZIP code serves a distinct delivery area within the city and surrounding region.

What is the main ZIP code for Castro Valley, CA?

The primary ZIP code for Castro Valley, CA is 94546. The city uses area code 510 or 341 for phone service.

What county is Castro Valley, CA in?

Castro Valley is located in Alameda County, California.

How many ZIP codes are in Castro Valley, CA?

Castro Valley, CA has 2 ZIP codes.

What ZIP code covers the Castro Valley downtown area and main commercial district?

The Castro Valley downtown area, centered around Castro Valley Boulevard, is primarily located in ZIP code 94546, which serves as the main commercial and civic center of the city.

Which ZIP code includes the Redwood Regional Park area in Castro Valley?

Redwood Regional Park and the surrounding residential neighborhoods in the eastern part of Castro Valley are located in ZIP code 94552.