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Diablo, CA

Census-designated place in Contra Costa County, California. ZIP codes: 94528.

Population

1,232

Land area

1.4sq mi

People per sq mi

903

ZIP codes

1

Diablo and its ZIP codes

Full map

Diablo at a glance

  • Diablo is about 3.6 times as dense as California as a whole.
  • The median household income is $248,150, about 2.5 times the California median of $99,122.
  • A typical owner-occupied home is valued at more than $2,000,000.

Local data for Diablo, CA

Counts from official public data

Housing and community stats

Diablo, CA, American Community Survey 2020-2024

Full profile

Median household income

$248,150

Poverty rate

13.2%

Median home value

$2,000,000+

Homeownership

100.0%

Bachelor's or higher

72.3%

Median age

43.3

Average commute

32.8 min

Largest reported origins and ancestries: Italian Americans (309), German Americans (298), Irish Americans (220).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, pay, income and spending are for Contra Costa County. PPP loans are for Diablo.

Details

Unemployment rate

5.0%

Aug 2026, -0.2 pts in a year

Average annual pay

$87,200

374,448 jobs, 2025

Income per person

$108,259

BEA, 2024

Federal spending

$7.1B

FY 2026, $6,088 per person

PPP loans

$1.09M

18 loans, 49 jobs reported

Contra Costa County economyFederal spendingPPP loans

How people get to work

Diablo, CA, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone55.2%
  • Carpooled12.4%
  • Public transit6.8%
  • Walked20.5%
  • Bicycle0.0%
  • Taxi, ride-hailing, motorcycle or other0.0%
  • Worked from home5.2%

Average one-way commute: 32.8 minutes for people who do not work from home.

Environment and hazard risk

Diablo, CA, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Very High

Top: earthquake

Storm events since 1996

472

Countywide, mostly strong wind

Flood insurance policies

2,681

0.9% of homes, county

July high / Jan low

83° / 42°F

26.1 inches of rain a year

Hazards, floods and storm historyCheck a flood zone

Health statistics

Share of adults in Diablo, CA, CDC PLACES estimates

All 40 measures

Obesity

25.5%

U.S. 33.3% -7.8 pts

Diabetes

9.2%

U.S. 12.1% -2.9 pts

Smoking

6.3%

U.S. 12.8% -6.5 pts

Uninsured (18-64)

2.8%

U.S. 11.1% -8.3 pts

ZIP codes in Diablo

1 in or overlapping Diablo. Population shown

·

Cities near Diablo

NameDistanceLand area (sq mi)
DanvilleTown2.2 mi18.1
BlackhawkCensus-designated place2.8 mi5.8
AlamoCensus-designated place2.8 mi9.8
North GateCensus-designated place4.8 mi0.7
Walnut CreekCity4.9 mi19.8
Camino TassajaraCensus-designated place5.3 mi1.3
San MiguelCensus-designated place5.7 mi1.1
Castle HillCensus-designated place5.9 mi0.6
Shell RidgeCensus-designated place5.9 mi0.4
San RamonCity6 mi20.1
Norris CanyonCensus-designated place6.7 mi3.6
ClaytonCity6.9 mi3.8
SaranapCensus-designated place7.2 mi1.1
Contra Costa CentreCensus-designated place7.9 mi0.6
Acalanes RidgeCensus-designated place8 mi0.5
MoragaTown8.7 mi9.5

Frequently asked questions

What county is Diablo, CA in?
Diablo is in Contra Costa County, California.
What ZIP codes are in Diablo, CA?
ZIP codes in or overlapping Diablo include 94528.
What is the population of Diablo, CA?
About 1,232 people live in Diablo, based on American Community Survey 5-year estimates.
What cities are near Diablo?
Nearby places include Danville (2.2 mi), Blackhawk (2.8 mi), Alamo (2.8 mi), North Gate (4.8 mi), Walnut Creek (4.9 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023