DiabloCA
A town of 1,232, settled in 1916.
Is Diablo a good place to live?
The best of Diablo’s subject grades are an A+ for health and schools and an A− for incomes; the weakest is a D− for cost of living. 72% of adults 25 and older hold a bachelor’s degree or more in Diablo, above both California’s towns (29%) and U.S. towns (29%). On cost of living, just 10 of California’s 1,058 towns do worse. FEMA rates its natural-hazard risk higher than 89% of U.S. communities, with earthquakes at the top. On history, just 29 of California’s 1,063 towns do worse. Diablo has fewer than 2,500 residents, so it gets subject grades but no overall grade.
What makes Diablo stand out
Where Diablo beats most towns, and one thing worth knowing.
1,232 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
How Diablo grades
Each subject compared with towns across the country (schools within California), ordered by how far Diablo is from typical.
How TownRatings grades towns →
Alcatraz Federal Penitentiary and 219 more within 40 miles
Museums, parks, gardens and other places to visit around Diablo. Close and well known come first.
Big draw26 mi MuseumAlcatraz Federal Penitentiary
Big draw20 mi MuseumUSS Hornet
Big draw30 mi Stadium & arenaLevi's Stadium
4 mi MountainMount Diablo
Big draw24 mi Stadium & arenaChase Center
Big draw24 mi Stadium & arenaOracle ParkPhoto credits
Alcatraz Federal Penitentiary: druchoy, CC BY-SA 2.0 · USS Hornet: kitmasterbloke, CC BY 2.0 · Levi's Stadium: Matthew Roth, CC BY-SA 2.0 · Mount Diablo: Trurl66, Public domain · Chase Center: Gregory Varnum, CC BY-SA 4.0 · Oracle Park: User Coasttocoast on en.wikipedia, CC BY-SA 3.0
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Moving to Diablo: who provides what
Diablo is unincorporated, so Contra Costa County and regional agencies provide most services.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.
The data
Ordered by what stands out in Diablo.
A larger share of households own their home in Diablo than in most of California or the rest of the country
100% of households own their home in Diablo, where California’s towns sit at 64% and U.S. towns at 73%. The typical Diablo home is worth about $3,103,000, up 3.8% in a year, 4 times the California typical home.
Typical home value
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
| School | Level | Students | Letter |
|---|---|---|---|
| The Athenian School PrivateLargest high schoolGrades 6–12 | Grades 6–12 | 537 | – |
NCES · EDFacts · graded within CA on state tests and graduation
Diablo is healthier than 98% of U.S. towns
Diablo beats the California average on 22 of 32 CDC measures and trails it on 2. 13% of Diablo adults report frequent mental distress.
| Diablo | California towns | U.S. towns | |
|---|---|---|---|
| Frequent mental distress (CDC PLACES) | 13% | 17% | 17% |
| Smoke cigarettes (CDC PLACES) | 6.3% | 11% | 14% |
| Frequent physical distress (CDC PLACES) | 10% | 14% | 14% |
| Fair or poor health (CDC PLACES) | 12% | 22% | 19% |
| What stands out | Diablo | CA |
|---|---|---|
| Fewer uninsured adults | 2.8% | 10.6% |
| Fewer adults facing food insecurity | 5.2% | 17.9% |
| More adults who have had cancer | 10.3% | 6.4% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Earthquakes leads a very high hazard risk in Diablo
One flood insurance claim has been paid in Diablo since 2017.
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
Fewer of Diablo’s working residents work locally than in the typical California or U.S. town
0.4% of working residents work locally in Diablo. The top destinations are San Francisco (9%), San Ramon (8%) and Oakland (6%). Diablo’s average trip to work is 33 minutes.
| Diablo | California towns | U.S. towns | |
|---|---|---|---|
| Average trip to work | 33 minutes | 28 minutes | 25 minutes |
| Working residents who work in town | 0.4% | 6.6% | 8% |
| Below the poverty line | 13% | 10% | 9.6% |
Where working residents work
Census LEHD 2023 · ACS
Mild winters and pleasant summers in Diablo
Diablo has warm winters and pleasant summers. The July high in Diablo is 84°F.
Typical low → high °F
NOAA U.S. Climate Normals, 1991–2020
| Diablo | California towns | U.S. towns | |
|---|---|---|---|
| Miles of trail per square mile | 0.8 miles per square mile | 1.0 | 0.4 |
| Conserved land | 1.9% | 4.3% | 4.3% |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Everything we know about Diablo
Colleges nearby
7 within 15 miles of the center of Diablo
About 3 of every 100 Diablo residents are enrolled in college, against 8 across California.
100% of working residents leave Diablo for work
Where Diablo’s working residents go each day. Line width shows the share.
Census LEHD 2023
About Diablo
Place in California, United States
Diablo (Spanish for "Devil") is a census-designated place (CDP) in Contra Costa County, California, United States. The population was 1,255 at the 2020 census. It is located 2.5 miles (4.0 km) east-northeast of Danville.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 1.4 sq mi
- Elevation
- 528 ft
- ZIP code
- 94528
- Area code
- 925
Questions about Diablo
Short answers, built from the data on this page.
Is Diablo, CA expensive?
Yes. The typical home is worth about $3,103,000, 307% above the California typical home and up 3.8% in a year. Cost of living, which also weighs rents, property taxes and how many households pay 30% or more of their income for housing, grades D−.