Diablo, California Demographics & Population 2026
During the 2020–2024 ACS period, Diablo, California had a total population of 1,232, the 1008th largest community in California, with a median household income of $248,150, which is 150% higher than the state average. The poverty rate is 13.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 150% above the state average — one of the wealthiest communities in California.
- 72.3% of adults hold a bachelor's degree or higher — top 10% in California.
- Housing affordability is a challenge — homes cost 8.1x the median household income.
Diablo Quick Facts
How Diablo Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 1,072 | 1,232 | +14.9% |
| Median home value | $2,000,000+ | $2,000,000+ | +0.0% |
How Diablo Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 70 | National average: 61
Education
Educational Attainment (Adults 25+)
Diablo Rankings in California
Explore California Rankings
Other Cities in Contra Costa County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Concord | 124,035 | $108,709 | 8.2% | $797,600 |
| Antioch | 116,477 | $97,465 | 11.4% | $629,700 |
| Richmond | 115,505 | $95,391 | 13.6% | $668,200 |
| San Ramon | 85,993 | $196,161 | 4.4% | $1,509,500 |
| Pittsburg | 76,257 | $99,861 | 11.2% | $597,900 |
| Walnut Creek | 70,088 | $130,432 | 6.4% | $1,057,300 |
| Brentwood | 65,208 | $142,494 | 8.3% | $836,600 |
| Oakley | 45,183 | $137,677 | 6.1% | $660,200 |
| Danville | 43,401 | $232,216 | 3.8% | $1,681,700 |
| Martinez | 36,903 | $127,355 | 6.3% | $859,800 |
Cities Similar to Diablo
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| La Honda | 1,269 | $250,000+ | $935,500 | 76.6% | 5.0% |
| Santa Margarita | 1,149 | N/A | $684,000 | 34.4% | 3.0% |
| Ladera | 1,297 | $235,750 | $2,000,000+ | 90.0% | 1.5% |
| Fort Hunter Liggett | 1,119 | N/A | N/A | 32.2% | N/A |
| Niland | 1,116 | N/A | $226,200 | 14.4% | 14.8% |
Population Overview
Diablo is a small community located in California, within Contra Costa County. The total population is 1,232. It ranks as the 1008th most populous out of 1,570 Census-designated places in California.
Age Demographics
The median age in Diablo is 43.3 years. This is 14% higher than the state median of 37.9 years. 17.6% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Diablo is $248,150. This is 150% higher than the state median of $99,122. It is also 207% higher than the national median of $80,734. The poverty rate stands at 13.2%. This is 10% higher than the state poverty rate of 12.0%. The unemployment rate is 5.0%. This is 25% lower than the state rate of 6.6%. The median home value is $2,000,000+. Housing costs are 172% higher than the state median of $734,700. The home-value-to-income ratio of 8.1x suggests that housing affordability is a significant concern for many residents. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 79% higher than the state average of 55.9%.
Race & Ethnicity
The largest racial or ethnic group in Diablo is White (non-Hispanic), making up 73.4% of the population. Hispanic or Latino residents account for 13.2%. The White (non-Hispanic) population is significantly higher than the state average (73.4% vs 33.8%). The Hispanic or Latino population (13.2%) is well below the state average of 40.2%. The Asian population (5.1%) is well below the state average of 15.3%.
Education
72.3% of residents aged 25 and older hold a bachelor's degree or higher. This places Diablo in the top 10% of all cities in the state for educational attainment. This is 95% higher than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample. Notably, 47.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Diablo, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,570 Census-designated places in California. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Diablo, California?
Diablo, California has a population of 1,232 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Diablo, CA?
The median household income in Diablo is $248,150, which is 207% higher than the national median of $80,734.
What is the poverty rate in Diablo, CA?
The poverty rate in Diablo is 13.2%. This means approximately 163 residents live below the federal poverty line.
What is the racial makeup of Diablo, California?
Diablo's population is 73.4% White, 0.0% Black, 13.2% Hispanic/Latino, and 5.1% Asian.
What is the median home value in Diablo, CA?
The median home value in Diablo is $2,000,000+. The home-value-to-income ratio is 8.1x.
How educated is Diablo, California?
72.3% of adults (25+) in Diablo hold a bachelor's degree or higher, and 47.2% hold a graduate or professional degree.