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 Native American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Asian

Two or more races

Black or African American

Native American

Native Hawaiian or Pacific Islander

Other 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%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

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