San Marino Flag

San Marino

County Seat:
No
Area (mi²):
3.766
State:
California

San Marino is a city located in Los Angeles County, California. San Marino has a 2026 population of 12,105. San Marino is currently growing at a rate of 0.22% annually but its population has decreased by -2.97% since the most recent census, which recorded a population of 12,475 in 2020.

12.1K
Total Population
3,215
Density (mi²)
26 0.22%
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)