Diablo Flag

Diablo

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. For every 100 females there are 73.7 males.

676
Total Population
496
Density (mi²)
-32 -4.52%
Growth

Diablo Population

Diablo Population

Data after 2023 is projected based on recent change

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

White (86.57%)

Other race (7.28%)

Two or more races (4.57%)

Asian (1.59%)

Race
Population
Percentage (of total)
White92886.57%
Other race787.28%
Two or more races494.57%
Asian171.59%

Diablo Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)