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, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Other race

Two or more races

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

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%
Black or African American	0	0%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

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