Castle Hill

County:: Contra Costa County
County Seat:: No
Area (mi²):: 0.585
State:: California

Castle Hill is a CDP located in Contra Costa County, California. Castle Hill has a 2025 population of 938. Castle Hill is currently declining at a rate of -2.49% annually and its population has decreased by -19.42% since the most recent census, which recorded a population of 1,164 in 2020.

The average household income in Castle Hill is $306,051 with a poverty rate of 0.38%.The median age in Castle Hill is 42.6 years: 43 years for males, and 41.8 years for females.

Demographics

The racial composition of Castle Hill includes 68.76% White, 15.04% Asian, 5.91% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	896	68.76%
Asian	196	15.04%
Two or more races	134	10.28%
Black or African American	77	5.91%

Castle Hill Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Castle Hill's average per capita income is $162,986. Household income levels show a median of $250,001. The poverty rate stands at 0.38%.

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
Households	$250,001	$306,051
Families	$250,001	$318,894
Married Families	$250,001	-
Non Families	-	$199,402

$162,986

Average Income

$250,001

Median Household Income

0.38%

Poverty Rate