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ZIP Code 94528
Diablo, CA, Contra Costa County
Population
1,049
Land area
1.2sq mi
People per sq mi
909
City
Diablo
ZIP 94528 and nearby ZIP codes
ZIP 94528 at a glance
- ZIP 94528 (Diablo) is about 3.6 times as dense as California as a whole.
- The median household income is $207,500, about 2.1 times the California median of $99,122.
- A typical owner-occupied home is valued at more than $2,000,000.
Local data for ZIP 94528
Counts from official public data
Housing and community stats
ZIP 94528, American Community Survey 2020-2024
Median household income
$207,500
Poverty rate
8.1%
Median home value
$2,000,000+
Homeownership
100.0%
Bachelor's or higher
79.8%
Median age
43.0
Average commute
41.8 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
22
ZIP Business Patterns 2023
Employees
170
$13.2M annual payroll
PPP loans
$1.1M
18 loans
Campaign donations
$44.8K
60% D, 9% R, 2026 cycle
Environment and hazard risk
ZIP 94528, from FEMA, NOAA and EPA
Natural hazard risk
Very High
Top: earthquake
Storm events since 1996
472
Countywide, mostly strong wind
Flood insurance policies
2,681
0.9% of homes, county
July high / Jan low
83° / 42°F
26.1 inches of rain a year
Health statistics
Share of adults in ZIP 94528, CDC PLACES estimates
Obesity
25.1%
U.S. 33.3% -8.2 pts
Diabetes
8.9%
U.S. 12.1% -3.2 pts
Smoking
6.0%
U.S. 12.8% -6.8 pts
Uninsured (18-64)
2.7%
U.S. 11.1% -8.4 pts
Frequently asked questions
- What city is ZIP code 94528?
- ZIP code 94528 is in Diablo, CA (Contra Costa County).
- What county is ZIP code 94528 in?
- ZIP code 94528 is mostly in Contra Costa County, California.
- How many people live in ZIP code 94528?
- About 1,049 people live in the 94528 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.