Residential delivery area · California
ZIP Code 94546: Castro Valley, CA
ZIP code 94546 uses the postal name Castro Valley, California and lies entirely in Alameda County (Census 2020 ZIP-county file). About 45,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Castro Valley's 2 residential ZIP codes. Median household income is $128,385 (Census Bureau, ACS 2020-2024). By Census place, 43% of its land lies in Castro Valley (a census-designated place), and under 1% in smaller places; 56% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Castro Valley · 2 residential ZIPs
- County
- Alameda County
- Census places
- Castro Valley census-designated place
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-14 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 16.0 sq mi · 2,811 people per sq mi
Where is ZIP code 94546?
94546 centers on 37.745°, -122.103° and covers 16.0 square miles of land plus 1.5 of water. It borders 7 ZIP codes: 94605, 94578, 94577, 94619, 94541, 94552, 94556.
The map draws ZIP code areas only. For the streets inside 94546, 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 94546 compare with the rest of Castro Valley?
| Measure | 94546 | In Castro Valley | In Alameda County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 44,855 | 1st of 2 | 13th of 53 | 305th of 1,802 |
| Median household income | $128k | 2nd of 2 | 26th of 48 | 289th of 1,189 |
| Median home value | $1.04M | 2nd of 2 | 28th of 49 | 329th of 1,317 |
Its median household income is higher than in 93% of U.S. residential ZIP codes, and it is denser than 88% 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 94546?
The 2020 Census counted 46,687 people in 94546; the ACS, which samples households over 2020-2024, estimates 44,855. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 44,855
- 2020 Census count
- 46,687
- Households
- 15,565
- Median age
- 41.7
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 94546?
Of the 44,855 people the ACS estimates in 94546, 20.9% are under 18 and 18.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (35.2%), then Asian (not Hispanic) (28.2%).
- Under 1820.9%
- 18 to 6460.6%
- 65 and older18.5%
- White, not Hispanic35.2%
- Asian, not Hispanic28.2%
- Hispanic or Latino23.5%
- Black, not Hispanic8.1%
- Other or two or more5.0%
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 94546 earn?
Median household income is $128,385 (ACS 2020-2024), the 26th highest of the 48 ranked ZIP codes in Alameda County.
- Median household income
- $128,385
- Income per person
- $57,324
- Below the poverty line
- 6.6%
- Unemployed (of the labor force)
- 3.7%
- Adults 25+ with a bachelor's degree
- 41.7%
- Adjusted gross income per tax return, 2022
- $119,24322,090 returns; wages 75% 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 94546?
FHFA's house price index for 94546, built from repeat sales and appraisals of the same homes, rose 76% from 2015 to 2025 and rose 32% from 2020 to 2025, and moved −1.0% in 2025.
- Median home value (owners' estimate)
- $1,043,500
- Median gross rent
- $2,539
- Homes owned by their occupants
- 66.3%
- Housing units
- 16,233
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 94546?
923 business establishments had a location in this ZIP code in 2023, 110 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance193
- Construction113
- Accommodation and food services108
- Professional, scientific, and technical services94
- Other services (except public administration)92
- Retail trade69
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 94546?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94605 | Oakland | 44,103 | $106k | 2.8 mi |
| 94578 | San Leandro | 41,769 | $94k | 2.9 mi |
| 94577 | San Leandro | 46,317 | $109k | 4.1 mi |
| 94619 | Oakland | 26,831 | $130k | 4.5 mi |
| 94541 | Hayward | 67,139 | $106k | 5.0 mi |
| 94552 | Castro Valley | 14,506 | $213k | 5.9 mi |
| 94556 | Moraga | 15,998 | $216k | 6.0 mi |
| 94603 | Oakland | 35,742 | $77k | 4.0 mi (near) |
| 94580 | San Lorenzo | 29,420 | $111k | 4.9 mi (near) |
| 94613 | Oakland | 472 | – | 5.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.