HomeCaliforniaContra Costa CountyDiablo
Diablo, California: commercial real estate data.
Diablo is a Census CDP of 1,232 people across 1.36 square miles of land, in Contra Costa County. Median household income is $248,150, 100.0 percent of occupied homes are owned.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Diablo
What Diablo is
- Census place typeCDP
- Land area1.36 sq mi
- Water area0 sq mi
- Population per square mile of land903 plus or minus 377
- County holding the largest share of its areaContra Costa County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Diablo
How many people live in Diablo
- Population1,232 plus or minus 514
- Median age43.3 plus or minus 9.8
- Population under 18262 plus or minus 176
- Share under 1821.3 percent plus or minus 11.2
- Population 65 and over237 plus or minus 124
- Share 65 and over19.2 percent plus or minus 6.1
- Households437 plus or minus 159
- Family households351 plus or minus 156
- Share of households that are families80.3 percent plus or minus 20.5
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Diablo
Income and work in Diablo
- Median household income$248,150 plus or minus $178,127
- Per capita income$127,494 plus or minus $49,790
- Civilian labor force622 plus or minus 319
- Employed591 plus or minus 313
- Unemployed31 plus or minus 43
- Unemployment rate5.0 percent plus or minus 6.4
- Adults 25 and over911 plus or minus 352
- Adults 25 and over with a high school diploma or higher100.0 percent plus or minus 51.5
- Adults 25 and over with a bachelor degree or higher72.3 percent
- Adults 25 and over with a graduate degree47.2 percent plus or minus 11.4
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Diablo
Housing in Diablo
- Housing units476 plus or minus 162
- Occupied units437 plus or minus 159
- Vacant units39 plus or minus 70
- Vacancy rate8.2 percent plus or minus 14.4
- Owner occupied437 plus or minus 159
- Renter occupied0
- Ownership rate100.0 percent
- Median owner-occupied home value$2,000,001
- Single family units476 plus or minus 179
- Share single family100.0 percent
- Units in buildings of two or more0
- Share in buildings of two or more0.0 percent
- Mobile homes0
- Median year structure built1980
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Diablo
How Diablo gets to work
- Workers 16 and over who commute560 plus or minus 325
- Commuting under 15 minutes255 plus or minus 213
- Share commuting under 15 minutes45.5 percent plus or minus 27.3
- Commuting 30 minutes or more267 plus or minus 169
- Share commuting 30 minutes or more47.7 percent plus or minus 12.1
- Drove alone55.2 percent plus or minus 15.7
- Carpooled12.4 percent plus or minus 6.4
- Public transport6.8 percent plus or minus 9.5
- Walked20.5 percent plus or minus 23.1
- Worked from home5.2 percent plus or minus 6.2
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Diablo
SBA loans in Diablo (504)
- Approvals1
- Gross approval$296,000
- Average approval$296,000
- Median approval$296,000
- Largest approval$296,000
- Jobs supported1
- Loans with a final outcome0
- Charged off0
- Median term240 months
- Distinct CDCs1
Counted by borrower city: approvals to borrowers whose address is in Diablo, in any county, FY2010 to FY2026. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Contra Costa County, not Diablo
Contra Costa County context, not Diablo figures
- Establishments in Contra Costa County25,932
- Covered employment, Contra Costa County373,992
- Average annual pay, Contra Costa County$86,234
- Housing units permitted, Contra Costa County2,155
Every figure in this section is published for Contra Costa County as a whole and is not a measurement of Diablo.
All Contra Costa County figures →
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Diablo questions, answered from the record.
How many people live in Diablo, California?
1,232, in 437 households. Diablo CDP covers 1.36 square miles of land, which is 903 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Diablo in?
Contra Costa County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Diablo?
$248,150. The median owner-occupied home is valued at $2,000,001. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Are the county figures on this page Diablo figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Contra Costa County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Diablo.
Is zoning published for Diablo?
No. Nothing on this page presents parcel level zoning.