Castle Hill, CA ZIP Codes
One ZIP code serves Castle Hill, California: 94595. Together they are home to 16,988 residents in 9,368 households. That is more than the 1,026 people counted inside Castle Hill Census-designated place, because these ZIP codes reach past its boundary.
Castle Hill Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 1,026 |
| Households | 353 |
| Median household income | $250,001 |
| Median home value | $2,000,001 |
| Median age | 43.9 |
| Median rent | not published |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 16,988 |
| Households (sum of ZIP codes) | 9,368 |
| Median household income, range across ZIP codes | $100,552 (94595) to $100,552 (94595) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $100,552 |
| Homeowners | 81.9% |
| Households with kids under 18 | 12.3% |
| Moved in the past year | 12.0% |
| Carrier routes in EDDM2GO's route library | 18 routes, 10,249 homes (1 of 1 ZIP codes) |
Every ZIP code in Castle Hill
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 94595 | Walnut Creek | 16,988 | 9,368 | $100,552 | $860,600 | 81.9% | 12.3% | 12.0% | 18 | 10,502 | 10% of its land |
A ZIP code is listed for Castle Hill when at least 10% of its land lies inside the Castle Hill Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Castle Hill. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Castle Hill.
Counties
- Contra Costa County — 47 ZIP codes
Nearby cities sharing these ZIP codes
- Walnut Creek — 4 ZIP codes
- Saranap — 1 ZIP code
Price a mailing to Castle Hill ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Castle Hill, CA?
- 94595. A ZIP code is listed for Castle Hill when at least 10% of its land lies inside the Castle Hill Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Castle Hill.
- What is the population of Castle Hill, CA?
- The Census Bureau counts 1,026 residents inside Castle Hill Census-designated place (ACS 2020–2024). The 1 ZIP code that serve Castle Hill hold 16,988 residents in all.
- What is the median household income in Castle Hill, CA?
- $250,001 inside Castle Hill Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $100,552 to $100,552.
- How many carrier routes and mailboxes are in Castle Hill, CA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 18 carrier routes reaching 10,249 residential and 253 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.