StatisticLake San MarcosCaliforniaNational
Population density (sq mi)2,65325691
Median age59.636.037.7
Male/Female ratio0.7:11.0:11.0:1
Married (15yrs & older)67%52%55%
Families w/ Kids under 1831%46%43%
Speak English73%56%79%
Speak Spanish17%29%13%

Key findings

  • The population density in Lake San Marcos is 936% higher than California
  • The median age in Lake San Marcos is 66% higher than California
  • In Lake San Marcos 81.94% of the population is White
  • In Lake San Marcos 0.00% of the population is Black
  • In Lake San Marcos 5.78% of the population is Asian

Compare Lake San Marcos, CA Demographics


      Lake San Marcos population breakdown by race

      RaceLake San MarcosCaliforniaNational
      American Indian0.22%0.74%0.82%
      Native Hawaiian0.00%0.39%0.18%
      Mixed race11.11%4.62%3.06%
      Other race0.95%13.28%4.75%
      In Lake San Marcos, 19.2% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Lake San Marcos age breakdown

      Marital status

      Age of children in married couples

      Source: The Lake San Marcos, CA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).