San Dimas Flag

San Dimas

County Seat:
No
Area (mi²):
15.034
State:
California

San Dimas is a city located in Los Angeles County, California. San Dimas has a 2026 population of 33,226. San Dimas is currently declining at a rate of -0.33% annually and its population has decreased by -4.51% since the most recent census, which recorded a population of 34,795 in 2020.

33.2K
Total Population
2,210
Density (mi²)
-111 -0.33%
Growth

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)