Lake San Marcos Flag

Lake San Marcos

County Seat:
No
Area (mi²):
1.707
State:
California

Lake San Marcos is a CDP located in San Diego County, California. Lake San Marcos has a 2025 population of 3,991. Lake San Marcos is currently declining at a rate of -0.72% annually but its population has increased by 0.86% since the most recent census, which recorded a population of 3,957 in 2020.

The average household income in Lake San Marcos is $127,344 with a poverty rate of 6.34%.The median age in Lake San Marcos is 60.1 years: 57.2 years for males, and 63.4 years for females.

4K
Total Population
2,338
Density (mi²)
-29 -0.72%
Growth

Lake San Marcos Population

Lake San Marcos Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Lake San Marcos includes 68.73% White, 18.98% other race, 5.66% Asian, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White3,43468.73%
Other race94818.98%
Asian2835.66%
Two or more races2805.6%
Black or African American511.02%

Lake San Marcos Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Lake San Marcos' average per capita income is $37,397. Household income levels show a median of $100,676. The poverty rate stands at 6.34%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$116,250-
Families$111,688$151,504
Households$100,676$127,344
Non Families$84,115$89,130

$37,397

Average Income

$100,676

Median Household Income

6.34%

Poverty Rate

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)