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 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.

10.9K
Total Population
12,550
Density (mi²)
-309 -2.76%
Growth

Alum Rock Population

Demographics

Economics and Income Statistics

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)