Statistic Lake San Marcos California National
Population 3,957 39,512,223 328,239,523
Population density (sq mi) 2,318 256 91
Median age 61.8 36.0 37.7
Male/Female ratio 1.0:1 1.0:1 1.0:1
Married (15yrs & older) 67% 52% 55%
Families w/ Kids under 18 31% 46% 43%
Speak English 84% 56% 79%
Speak Spanish 6% 29% 13%
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Demographics Quick Facts

  • The population density in Lake San Marcos is 806% higher than California
  • The median age in Lake San Marcos is 72% higher than California
  • In Lake San Marcos 86.18% of the population is White
  • In Lake San Marcos 3.89% of the population is Black
  • In Lake San Marcos 3.66% of the population is Asian

Compare Lake San Marcos, CA Demographics

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      Lake San Marcos population breakdown by race

      Race Lake San Marcos California National
      White 86.18% 61.26% 73.35%
      Black 3.89% 5.85% 12.63%
      Asian 3.66% 13.85% 5.22%
      American Indian 0.00% 0.74% 0.82%
      Native Hawaiian 0.00% 0.39% 0.18%
      Mixed race 1.72% 4.62% 3.06%
      Other race 4.55% 13.28% 4.75%
      In Lake San Marcos, 8.2% 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 United States Census Bureau American Community Survey (ACS).