Castro Valley, CA ZIP Codes
3 ZIP codes serve Castro Valley, California: 94546, 94578 and 94552. Together they are home to 101,130 residents in 34,490 households. That is more than the 65,001 people counted inside Castro Valley Census-designated place, because these ZIP codes reach past its boundary. Median household income ranges from $94,084 in 94578 to $212,605 in 94552.
Castro Valley Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 65,001 |
| Households | 22,021 |
| Median household income | $142,779 |
| Median home value | $1,104,600 |
| Median age | 42.9 |
| Median rent | $2,554 |
All 3 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 101,130 |
| Households (sum of ZIP codes) | 34,490 |
| Median household income, range across ZIP codes | $94,084 (94578) to $212,605 (94552) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $126,818 |
| Homeowners | 61.3% |
| Households with kids under 18 | 34.4% |
| Moved in the past year | 7.7% |
| Carrier routes in EDDM2GO's route library | 69 routes, 37,235 homes (3 of 3 ZIP codes) |
Top facts
- Highest median household income in Castro Valley: 94552 ($212,605)
- Most residents: 94546 (44,855 people)
- Highest homeownership: 94552 (93.2% own their home)
- Most households with kids: 94546 (35.2% of households)
- Most new movers: 94578 (8.2% moved in last year)
- Youngest median age: 94578 (37.9 years)
- Highest median home value: 94552 ($1,394,300)
Every ZIP code in Castro Valley
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 94546 | Castro Valley | 44,855 | 15,565 | $128,385 | $1,043,500 | 66.3% | 35.2% | 7.2% | 33 | 18,460 | 43% of its land; mailing city |
| 94578 | San Leandro | 41,769 | 13,904 | $94,084 | $823,000 | 44.1% | 33.2% | 8.2% | 25 | 15,397 | 37% of its land |
| 94552 | Castro Valley | 14,506 | 5,021 | $212,605 | $1,394,300 | 93.2% | 34.9% | 7.5% | 11 | 5,189 | 16% of its land; mailing city |
A ZIP code is listed for Castro Valley when at least 10% of its land lies inside the Castro Valley Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Castro Valley. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Castro Valley.
Counties
- Alameda County — 52 ZIP codes
Nearby cities sharing these ZIP codes
- San Leandro — 3 ZIP codes
- Ashland — 3 ZIP codes
- Union City — 2 ZIP codes
Price a mailing to Castro Valley ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Castro Valley, CA?
- 94546, 94578 and 94552. A ZIP code is listed for Castro Valley when at least 10% of its land lies inside the Castro Valley Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Castro Valley.
- What is the population of Castro Valley, CA?
- The Census Bureau counts 65,001 residents inside Castro Valley Census-designated place (ACS 2020–2024). The 3 ZIP codes that serve Castro Valley hold 101,130 residents in all.
- What is the median household income in Castro Valley, CA?
- $142,779 inside Castro Valley Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $94,084 to $212,605.
- Which Castro Valley ZIP code has the highest median household income?
- 94552, at $212,605, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Castro Valley, CA?
- For the 3 of 3 ZIP codes in EDDM2GO's stored route library: 69 carrier routes reaching 37,235 residential and 1,761 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.