Diablo

County:: Contra Costa County
County Seat:: No
Area (mi²):: 1.364
State:: California

Diablo is a CDP located in Contra Costa County, California. Diablo has a 2025 population of 676. Diablo is currently declining at a rate of -4.52% annually and its population has decreased by -18.94% since the most recent census, which recorded a population of 834 in 2020.

The average household income in Diablo is $291,082 with a poverty rate of 9.89%.The median age in Diablo is 37.7 years: 37.9 years for males, and 37.5 years for females.

Demographics

The racial composition of Diablo includes 86.57% White, 7.28% other race, and smaller percentages for Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	928	86.57%
Other race	78	7.28%
Two or more races	49	4.57%
Asian	17	1.59%

Diablo Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Diablo's average per capita income is $0. Household income levels show a median of $0. The poverty rate stands at 9.89%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$241,318	-
Families	$240,203	$321,586
Households	-	$291,082
Non Families	-	-

$0

Average Income

$0

Median Household Income

9.89%

Poverty Rate