Castle Hill Flag

Castle Hill

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. For every 100 females there are 89.7 males.

938
Total Population
1,605
Density (mi²)
-24 -2.49%
Growth

Castle Hill Population

Castle Hill Population

Data after 2023 is projected based on recent change

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

White (68.76%)

Asian (15.04%)

Two or more races (10.28%)

Black or African American (5.91%)

Race
Population
Percentage (of total)
White89668.76%
Asian19615.04%
Two or more races13410.28%
Black or African American775.91%

Castle Hill Marital Status

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

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

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)