Alum Rock Flag

Alum Rock

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

Alum Rock is a CDP located in Santa Clara County, California. Alum Rock has a 2026 population of 10,715. Alum Rock is currently declining at a rate of -2.73% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median household income in Alum Rock is $126,705 with a poverty rate of 6.15%. The median age in Alum Rock is 41 years: 40.7 years for males, and 42.7 years for females. For every 100 females there are 107.0 males.

10.7K
Total Population
12,331
Density (mi²)
-301 -2.73%
Growth

Alum Rock Population

Alum Rock Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202610,715-301-2.73%
202511,016-302-2.67%

Median Age

Overall: 41 years
Female: 42.7 years
Male: 40.7 years

Alum Rock Adults

There are 8,528 adults, (1,935 of whom are seniors) in Alum Rock.

Sex Ratio

Female: 5,044 (48.3%)
Male: 5,396 (51.7%)

Demographics

The racial composition of Alum Rock includes 38.58% other race, 21.09% Asian, 17.37% White, and smaller percentages for Native American, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
Other race4,02838.58%
Two or more races2,23621.42%
Asian2,20221.09%
White1,81317.37%
Native American1000.96%
Black or African American400.38%
Native Hawaiian or Pacific Islander210.2%
Race
Population ↓
Percentage (of total)
Other race3,80536.45%
Two or more races2,16420.73%
White5655.41%
Native American930.89%
Black or African American100.1%
Race
Population ↓
Percentage (of total)
Asian2,20221.09%
White1,24811.95%
Other race2232.14%
Two or more races720.69%
Black or African American300.29%
Native Hawaiian or Pacific Islander210.2%
Native American70.07%

Alum Rock Marital Status

Economics and Income Statistics

Alum Rock 's average per capita income is $52,093. Household income levels show a median of $126,705. The poverty rate stands at 6.15%.

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$134,821-
Families$129,009$140,057
Households$126,705$145,202
Non Families$93,003$111,307

$52,093

Average Income

$126,705

Median Household Income

6.15%

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)