Residential delivery area · California
ZIP Code 94552: Castro Valley, CA
ZIP code 94552 uses the postal name Castro Valley, California and lies entirely in Alameda County (Census 2020 ZIP-county file). About 15,000 people live there (Census Bureau, ACS 2020-2024), the less populous of Castro Valley's 2 residential ZIP codes. Median household income is $212,605 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Castro Valley (16%) and Union City (13%), and 5% in smaller places; 66% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Castro Valley · 2 residential ZIPs
- County
- Alameda County
- Census places
- Castro Valley (16%) census-designated place; Union City (13%)
- Neighborhood
- Dresser GeoNames
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-14 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 51.8 sq mi · 280 people per sq mi
Where is ZIP code 94552?
94552 centers on 37.706°, -122.008° and covers 51.8 square miles of land plus 0.0 of water. It borders 10 ZIP codes: 94542, 94583, 94541, 94568, 94546, 94587, 94536, 94588, 94556, 94586.
The map draws ZIP code areas only. For the streets inside 94552, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 94552 compare with the rest of Castro Valley?
| Measure | 94552 | In Castro Valley | In Alameda County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 14,506 | 2nd of 2 | 43rd of 53 | 916th of 1,802 |
| Median household income | $213k | 1st of 2 | 6th of 48 | 36th of 1,189 |
| Median home value | $1.39M | 1st of 2 | 8th of 49 | 167th of 1,317 |
Its median household income is higher than in 99% of U.S. residential ZIP codes, and it is denser than 66% of all 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 94552?
The 2020 Census counted 14,721 people in 94552; the ACS, which samples households over 2020-2024, estimates 14,506. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 14,506
- 2020 Census count
- 14,721
- Households
- 5,021
- Median age
- 48.9
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 94552?
Of the 14,506 people the ACS estimates in 94552, 20.7% are under 18 and 22.4% are 65 or older. The largest group by race and Hispanic origin is Asian (not Hispanic) (45.2%), then White (not Hispanic) (36.4%).
- Under 1820.7%
- 18 to 6456.8%
- 65 and older22.4%
- Asian, not Hispanic45.2%
- White, not Hispanic36.4%
- Hispanic or Latino10.3%
- Other or two or more5.4%
- Black, not Hispanic2.7%
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 94552 earn?
Median household income is $212,605 (ACS 2020-2024), the 6th highest of the 48 ranked ZIP codes in Alameda County.
- Median household income
- $212,605±$21,902
- Income per person
- $78,286
- Below the poverty line
- 6.5%
- Unemployed (of the labor force)
- 4.2%
- Adults 25+ with a bachelor's degree
- 61.0%
- Adjusted gross income per tax return, 2022
- $188,3377,040 returns; wages 69% of AGI (IRS)
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 94552?
FHFA's house price index for 94552, built from repeat sales and appraisals of the same homes, rose 75% from 2015 to 2025 and rose 43% from 2020 to 2025.
- Median home value (owners' estimate)
- $1,394,300
- Median gross rent
- $3,197
- Homes owned by their occupants
- 93.2%
- Housing units
- 5,088
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 94552?
197 business establishments had a location in this ZIP code in 2023, 8 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services32
- Real estate and rental and leasing25
- Health care and social assistance23
- Construction21
- Other services (except public administration)18
- Administrative and support and waste management and remediation services14
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 94552?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94542 | Hayward | 14,871 | $134k | 3.6 mi |
| 94583 | San Ramon | 39,583 | $185k | 4.7 mi |
| 94541 | Hayward | 67,139 | $106k | 4.9 mi |
| 94568 | Dublin | 70,803 | $214k | 5.9 mi |
| 94546 | Castro Valley | 44,855 | $128k | 5.9 mi |
| 94587 | Union City | 67,464 | $134k | 8.8 mi |
| 94536 | Fremont | 70,619 | $168k | 9.5 mi |
| 94588 | Pleasanton | 34,328 | $191k | 9.9 mi |
| 94556 | Moraga | 15,998 | $216k | 10.2 mi |
| 94586 | Sunol | 971 | $205k | 12.8 mi |
| 94544 | Hayward | 76,947 | $108k | 5.7 mi (near) |
| 94578 | San Leandro | 41,769 | $94k | 6.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.