Residential delivery area · California
ZIP Code 94528: Diablo, CA
ZIP code 94528 is in Diablo, California, entirely in Contra Costa County (Census 2020 ZIP-county file). About 1,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $207,500 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- ZBP2023
- Town
- Diablo · its only residential ZIP
- County
- Contra Costa County
- Census places
- Diablo census-designated place
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-10 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 1.2 sq mi · 909 people per sq mi
Where is ZIP code 94528?
94528 centers on 37.841°, -121.958° and covers 1.2 square miles of land. It borders 3 ZIP codes: 94526, 94507, 94506.
The map draws ZIP code areas only. For the streets inside 94528, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 94528 compare with the rest of Contra Costa County?
| Measure | 94528 | In Contra Costa County | In CA |
|---|---|---|---|
| People (ACS 2020-2024) | 1,049 | 44th of 48 | 1,410th of 1,802 |
| Median household income | $208k | not ranked | not ranked |
| Median home value | $2M+ | 1= of 43 | 1= of 1,317 |
94528's median household income is not ranked: its 90% margin of error (±$151,231) is more than a quarter of the figure ($207,500). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
1= means a shared first place: 94528's median home value ties with 2 other ZIP codes at the Census cap in Contra Costa County; median home value ties with 61 other ZIP codes at the Census cap in California.
It is denser than 78% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 94528?
The 2020 Census counted 1,054 people in 94528; the ACS, which samples households over 2020-2024, estimates 1,049. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,049±531 (90% margin)
- 2020 Census count
- 1,054
- Households
- 424
- Median age
- 43.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 94528?
Of the 1,049 people the ACS estimates in 94528, 25.0% are under 18 and 22.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (76.2%).
- Under 1825.0%
- 18 to 6452.4%
- 65 and older22.6%
- White, not Hispanic76.2%
- Other or two or more9.7%
- Hispanic or Latino8.1%
- Asian, not Hispanic6.0%
- Black, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 94528 earn?
Median household income is $207,500 (ACS 2020-2024).
- Median household income
- $207,500±$151,231
- Income per person
- $127,901
- Below the poverty line
- 8.1%
- Unemployed (of the labor force)
- 7.1%
- Adults 25+ with a bachelor's degree
- 79.8%
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 94528?
- Median home value (owners' estimate)
- $2,000,000 or more
- Median gross rent
- –
- Homes owned by their occupants
- 100.0%
- Housing units
- 463
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 94528?
22 business establishments had a location in this ZIP code in 2023, 4 more than in 2018; the most are in real estate and rental and leasing (ZIP Code Business Patterns).
- Real estate and rental and leasing5
- Professional, scientific, and technical services4
- Arts, entertainment, and recreation3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 94528?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94526 | Danville | 32,584 | $225k | 2.3 mi |
| 94507 | Alamo | 14,586 | $250k+ | 2.8 mi |
| 94506 | Danville | 27,055 | $250k+ | 3.9 mi |
| 94517 | Clayton | 12,316 | $169k | 4.9 mi (near) |
| 94583 | San Ramon | 39,583 | $185k | 5.1 mi (near) |
| 94596 | Walnut Creek | 23,417 | $136k | 5.4 mi (near) |
| 94582 | San Ramon | 47,424 | $215k | 5.8 mi (near) |
| 94598 | Walnut Creek | 27,206 | $186k | 6.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.