Bethel Island

County:: Contra Costa County
County Seat:: No
Area (mi²):: 5.251
State:: California

Bethel Island is a CDP located in Contra Costa County, California. Bethel Island has a 2025 population of 1,957. Bethel Island is currently declining at a rate of -0.61% annually and its population has decreased by -2.88% since the most recent census, which recorded a population of 2,015 in 2020.

The average household income in Bethel Island is $92,308 with a poverty rate of 29.76%.The median age in Bethel Island is 54.5 years: 37.8 years for males, and 57 years for females.

Demographics

The racial composition of Bethel Island includes 67.3% White, 20.94% other race, 6.76% Asian, and smaller percentages for Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	1,443	67.3%
Other race	449	20.94%
Asian	145	6.76%
Two or more races	70	3.26%
Native Hawaiian or Pacific Islander	37	1.73%

Bethel Island Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Bethel Island's average per capita income is $78,518. Household income levels show a median of $78,393. The poverty rate stands at 29.76%.

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	$181,849	-
Families	$99,611	$121,103
Households	$78,393	$92,308
Non Families	-	$69,462

$78,518

Average Income

$78,393

Median Household Income

29.76%

Poverty Rate