Alum Rock

County:: Santa Clara County
County Seat:: No
Area (mi²):: 0.869
State:: California

Alum Rock is a CDP located in Santa Clara County, California. Alum Rock has a 2025 population of 10,905. Alum Rock is currently declining at a rate of -2.76% annually and its population has decreased by -7.57% since the most recent census, which recorded a population of 11,798 in 2020.

The average household income in Alum Rock is $130,196 with a poverty rate of 8.66%. The median age in Alum Rock is 40.3 years: 40.3 years for males, and 40.3 years for females.

Demographics

The racial composition of Alum Rock includes 43.3% other race, 20.57% Asian, 19.55% White, and smaller percentages for Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Other race

Asian

White

Two or more races

Black or African American

Native Hawaiian or Pacific Islander

Native American

Race	Population	Percentage (of total)
Other race	5,031	43.3%
Asian	2,390	20.57%
White	2,271	19.55%
Two or more races	1,819	15.66%
Black or African American	49	0.42%
Native Hawaiian or Pacific Islander	32	0.28%
Native American	27	0.23%

Alum Rock Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Alum Rock's average per capita income is $49,362. Household income levels show a median of $111,976. The poverty rate stands at 8.66%.

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	$124,547	-
Families	$118,017	$122,114
Households	$111,976	$130,196
Non Families	$86,927	$101,911

$49,362

Average Income

$111,976

Median Household Income

8.66%

Poverty Rate