94546 ZIP Code — Castro Valley, CA
Alameda County, California
ZIP code 94546 is located in Castro Valley, California, within Alameda County. It covers approximately 15.96 square miles and serves a population of 45,761 residents. This is a po box ZIP code in the Pacific (PT) timezone, served by area code 510/341.
About ZIP code 94546
The housing stock consists of a mix of housing types. Most homes were built in the 1950s, giving the area an established character. Median home value is $935,700. Owner-occupancy sits near the national average at 66%.
The gap between median ($117,808) and mean household income suggests income inequality — a small number of higher earners pull the average up. 31% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 34 minutes is near the national average.
Educational attainment is near the national average, with 40% of residents holding a bachelor's degree or higher.
45,761
population
15.96
sq mi land
PO Box
ZIP type
Pacific (PT)
timezone
94546 ZIP code map
Cities in ZIP code 94546
Below are the cities the US Postal Service accepts for ZIP code 94546. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Castro Valley | Acceptable |
| Castro Valley | Preferred |
Nearby ZIP codes
94605 Oakland (2.2 mi)
94578 San Leandro (2.8 mi)
94603 Oakland (3.3 mi)
94577 San Leandro (3.3 mi)
94619 Oakland (4 mi)
94579 San Leandro (4.7 mi)
94580 San Lorenzo (5 mi)
94621 Oakland (5.1 mi)
94541 Hayward (5.5 mi)
94601 Oakland (5.8 mi)
94575 Moraga (6.1 mi)
94556 Moraga (6.2 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 45,761 |
| Population density | 2,867 / sq mi |
| State FIPS | 06 |
| County FIPS | 001 |
| Geography | |
|---|---|
| Land area | 15.96 sq mi |
| Water area | 1.53 sq mi |
| Latitude | 37.7483 |
| Longitude | -122.1163 |
| Timezone | Pacific (PT) |
| Area code | 510/341 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 23.1% | 24.6% | 32.6% |
| $50k – $100k | 26.0% | 23.2% | 27.7% |
| $100k – $200k | 34.3% | 30.5% | 26.4% |
| Over $200k | 16.6% | 21.7% | 13.3% |
Demographics & statistics
45,761
Population
2,867
People per sq mi
42.3
Median age
$117,808
Median household income
$51,886
Per capita income
$935,700
Median home value
$2,371
Median monthly rent
65.7%
Home ownership
7.5%
Poverty rate
3.7%
Unemployment
10,980
Housing units
40.4%
Bachelor's or higher
Age distribution
Male
Female
1,143
Under 5
1,204
1,496
5–9
1,574
1,173
10–14
1,234
1,277
15–19
1,344
880
20–24
926
2,376
25–34
2,501
3,814
35–44
4,015
2,984
45–54
3,141
1,537
55–59
1,618
1,513
60–64
1,593
2,388
65–74
2,514
1,137
75–84
1,196
576
85+
607
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 9,754 | 21.3% |
| 18 and over | 36,007 | 78.7% |
| 65 and over | 8,418 | 18.4% |
| Median age | 42.3 years | |
Race & ethnicity
White
40.7%
Asian
24.9%
Two or more races
11.1%
Hispanic or Latino
11%
Black or African American
6%
Other race
5%
American Indian / Alaska Native
1.1%
Native Hawaiian / Pacific Islander
0.2%
| Group | Count | % |
|---|---|---|
| White | 20,903 | 40.7% |
| Asian | 12,794 | 24.9% |
| Two or more races | 5,725 | 11.1% |
| Hispanic or Latino | 5,639 | 11% |
| Black or African American | 3,103 | 6% |
| Other race | 2,567 | 5% |
| American Indian / Alaska Native | 575 | 1.1% |
| Native Hawaiian / Pacific Islander | 94 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 23.1% | 24.6% | 32.6% |
| $50k – $100k | 26.0% | 23.2% | 27.7% |
| $100k – $200k | 34.3% | 30.5% | 26.4% |
| Over $200k | 16.6% | 21.7% | 13.3% |
Under $10k
4.0%
$10k–$15k
1.1%
$15k–$25k
3.6%
$25k–$35k
4.3%
$35k–$50k
7.1%
$50k–$75k
11.4%
$75k–$100k
10.9%
$100k–$150k
19.8%
$150k–$200k
13.6%
$200k+
24.1%
| Range | % of households |
|---|---|
| Under $10k | 4.0% |
| $10k–$15k | 1.1% |
| $15k–$25k | 3.6% |
| $25k–$35k | 4.3% |
| $35k–$50k | 7.1% |
| $50k–$75k | 11.4% |
| $75k–$100k | 10.9% |
| $100k–$150k | 19.8% |
| $150k–$200k | 13.6% |
| $200k+ | 24.1% |
| Median income | $117,808 |
Housing
Home values
Under $50k
1.2%
$50k–$100k
2.0%
$100k–$150k
0.6%
$150k–$200k
0.3%
$200k–$300k
0.1%
$300k–$500k
2.8%
$500k–$1M
52.2%
$1M+
40.9%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $935,700 |
| Median rent / month | $2,371 |
| Owner occupied | 65.7% |
| Renter occupied | 34.3% |
| Vacant | 3.2% |
| Single-family detached | 65.0% |
| Large apartment buildings | 11.0% |
| Mobile homes | 1.5% |
| Median rooms | 5.4 |
| Avg household size (owned) | 2.93 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.2% |
| 2010–2019 | 1.5% |
| 2000–2009 | 3.0% |
| 1990–1999 | 6.9% |
| 1980–1989 | 10.7% |
| 1970–1979 | 13.7% |
| 1960–1969 | 15.9% |
| 1950–1959 | 29.8% |
| 1940–1949 | 14.6% |
| 1939 or earlier | 3.8% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.8% |
| 1 bedroom | 7.2% |
| 2 bedrooms | 32.0% |
| 3 bedrooms | 39.2% |
| 4 bedrooms | 17.1% |
| 5+ bedrooms | 2.8% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 5.8% |
| 1 vehicle | 25.2% |
| 2 vehicles | 40.8% |
| 3 or more | 28.3% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 71.8% |
| Electricity | 23.8% |
| Propane / LP gas | 2.1% |
| Wood | 0.4% |
| Solar | 0.4% |
| No fuel used | 1.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 8,908 | 56.0% |
| Cohabiting couple | 1,113 | 7.0% |
| Male householder, no spouse | 2,162 | 13.6% |
| Female householder, no spouse | 3,714 | 23.4% |
| Households with children under 18 | 5,624 | 35.4% |
| Households with seniors (65+) | 5,816 | 36.6% |
| Average household size | 2.84 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 31.1% | 30.2% |
| Married | 56.2% | 49.4% |
| Separated | 0.8% | 1.5% |
| Widowed | 3.1% | 8.9% |
| Divorced | 8.7% | 10.0% |
Education
Less than 9th grade
5.4%
Some HS, no diploma
3.5%
HS graduate
19.9%
Some college, no degree
20.4%
Associate's degree
10.4%
Bachelor's degree
25.8%
Graduate / professional
14.6%
| Metric | % |
|---|---|
| HS diploma or higher | 91.0% |
| Bachelor's or higher | 40.4% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 645 | 6.1% |
| Kindergarten | 650 | 6.1% |
| Elementary school | 4,006 | 37.8% |
| High school | 2,585 | 24.4% |
| College / grad school | 2,698 | 25.5% |
Employment
Industry of employment
Education & healthcare
24.7%
Professional & management
15.8%
Retail trade
12.2%
Construction
7.8%
Manufacturing
7.3%
Transportation & utilities
7.0%
Arts, food & hospitality
6.1%
Finance & real estate
5.0%
Other services
4.1%
Public administration
4.0%
Information
3.5%
Wholesale trade
2.4%
Agriculture & mining
0.1%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 49.8% |
| Service | 13.5% |
| Sales & office | 19.4% |
| Natural resources & construction | 7.7% |
| Production & transportation | 9.6% |
Employment type
| Type | % |
|---|---|
| Private sector | 77.5% |
| Government | 16.1% |
| Self-employed | 6.3% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 66.2% |
| Carpool | 8.1% |
| Public transit | 6.1% |
| Walk | 1.4% |
| Work from home | 16.9% |
| Other means | 1.3% |
| Avg commute (minutes) | 34.1 |
Poverty
All people
7.5%
Under 18 years
6.4%
18 and over
7.8%
Married-couple families
3.4%
Female-led households
8.4%
Income support
| Source | % of households |
|---|---|
| Social Security | 30.5% |
| Retirement income | 26.1% |
| Supplemental Security | 5.1% |
| Cash public assistance | 3.3% |
| Food stamps / SNAP | 6.2% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 25.1% |
| High blood pressure | 27.6% |
| High cholesterol | 30.7% |
| Diabetes | 8.8% |
| Heart disease | 5.3% |
| Stroke | 2.5% |
| Asthma | 9.1% |
| Arthritis | 20.5% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.1% |
| Cancer | 6.5% |
| Behavior / access | % |
|---|---|
| Smoking | 10.4% |
| Binge drinking | 16.4% |
| No physical activity | 16.7% |
| Less than 7 hrs sleep | 28.3% |
| Depression | 15.5% |
| Fair or poor health | 11.8% |
| Poor mental health | 13.1% |
| Poor physical health | 8.6% |
| No health insurance | 9.5% |
| Visited doctor (checkup) | 66.9% |
| Visited dentist | 66.3% |
| Cholesterol screening | 92.7% |
| Teeth loss | 8.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,974 | 5.5% |
| Disability | % |
|---|---|
| Any disability | 10.0% |
| Under 18 | 3.3% |
| 18–64 years | 6.9% |
| 65 and over | 28.8% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 77.5% |
| Public insurance | 31.1% |
| No insurance | 4.7% |
| Uninsured under 19 | 4.2% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 43,414 | 94.9% |
| Spanish | 6,870 | 15.8% |
| Other Indo-European | 1,326 | 3.1% |
| Asian & Pacific Islander | 683 | 1.6% |
| Other languages | 4,518 | 10.4% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 33,899 | 74.1% |
| Born in same state | 33,300 | 72.8% |
| Born in different state | 28,114 | 61.4% |
| Foreign born | 599 | 1.3% |
| Naturalized citizen | 11,862 | 25.9% |
| Not a US citizen | 7,816 | 65.9% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 3,526 | 7.7% |
| Italian | 3,509 | 7.7% |
| Arab | 1,208 | 2.6% |
| Polish | 493 | 1.1% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 243 | 0.5% |
| English | 203 | 0.4% |
| Irish | 87 | 0.2% |
| Norwegian | 73 | 0.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 34.7% |
| Internet access | 96.5% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 94546
What city is ZIP code 94546 in?
ZIP code 94546 is primarily assigned to Castro Valley, California.
What county is ZIP code 94546 in?
ZIP code 94546 falls within Alameda County, California.
What is the typical home value in ZIP code 94546?
The median home value in ZIP code 94546 is $935,700.
What is the median household income in ZIP code 94546?
The median household income in ZIP code 94546 is $117,808, above the national median of ~$75,000.
What is the population of ZIP code 94546?
ZIP code 94546 has an estimated population of 45,761 residents, with a density of 2,868 people per square mile.
What timezone is ZIP code 94546 in?
ZIP code 94546 observes the PST timezone.