Diablo, CA ZIP Codes
2 ZIP codes serve Diablo, California: 94506 and 94528. Together they are home to 28,104 residents in 9,609 households. That is more than the 1,232 people counted inside Diablo Census-designated place, because these ZIP codes reach past its boundary. Median household income ranges from $207,500 in 94528 to $250,000+ in 94506.
Diablo Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 1,232 |
| Households | 437 |
| Median household income | $248,150 |
| Median home value | $2,000,001 |
| Median age | 43.3 |
| Median rent | not published |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 28,104 |
| Households (sum of ZIP codes) | 9,609 |
| Median household income, range across ZIP codes | $207,500 (94528) to $250,000+ (94506) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $248,126 |
| Homeowners | 88.6% |
| Households with kids under 18 | 41.9% |
| Moved in the past year | 9.5% |
| Carrier routes in EDDM2GO's route library | 15 routes, 8,802 homes (1 of 2 ZIP codes) |
Top facts
- Highest median household income in Diablo: 94506 ($250,000+)
- Most residents: 94506 (27,055 people)
- Highest homeownership: 94528 (100.0% own their home)
- Most households with kids: 94506 (42.4% of households)
- Most new movers: 94506 (9.8% moved in last year)
- Youngest median age: 94528 (43.0 years)
- Highest median home value: 94528 ($2,000,000+)
Every ZIP code in Diablo
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 94506 | Danville | 27,055 | 9,185 | $250,000+ | $1,956,800 | 88.1% | 42.4% | 9.8% | 15 | 9,019 | 1% of its land |
| 94528 | Diablo | 1,049 | 424 | $207,500 | $2,000,000+ | 100.0% | 31.4% | 3.0% | — | — | 100% of its land; mailing city |
A ZIP code is listed for Diablo when at least 10% of its land lies inside the Diablo Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Diablo. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Diablo.
Counties
- Contra Costa County — 47 ZIP codes
Nearby cities sharing these ZIP codes
- Danville — 2 ZIP codes
- Blackhawk — 1 ZIP code
- Camino Tassajara — 1 ZIP code
Price a mailing to Diablo ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Diablo, CA?
- 94506 and 94528. A ZIP code is listed for Diablo when at least 10% of its land lies inside the Diablo Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Diablo.
- What is the population of Diablo, CA?
- The Census Bureau counts 1,232 residents inside Diablo Census-designated place (ACS 2020–2024). The 2 ZIP codes that serve Diablo hold 28,104 residents in all.
- What is the median household income in Diablo, CA?
- $248,150 inside Diablo Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $207,500 to $250,000+.
- Which Diablo ZIP code has the highest median household income?
- 94506, at $250,000+, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Diablo, CA?
- For the 1 of 2 ZIP codes in EDDM2GO's stored route library: 15 carrier routes reaching 8,802 residential and 86 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.