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 2026 population of 5,125. Lake San Marcos is currently growing at a rate of 0.85% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median household income in Lake San Marcos is $89,851 with a poverty rate of 5.98%. The median age in Lake San Marcos is 63 years: 60.5 years for males, and 64.1 years for females. For every 100 females there are 84.3 males.

5.1K
Total Population
3,003
Density (mi²)
43 0.85%
Growth

Lake San Marcos Population

Lake San Marcos Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20265,125430.85%
20255,082430.85%

Median Age

Overall: 63 years
Female: 64.1 years
Male: 60.5 years

Lake San Marcos Adults

There are 4,304 adults, (2,192 of whom are seniors) in Lake San Marcos.

Sex Ratio

Female: 2,547 (54.3%)
Male: 2,146 (45.7%)

Demographics

The racial composition of Lake San Marcos includes 67.36% White, 18.2% other race, 5.16% Asian, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White3,16167.36%
Other race85418.2%
Two or more races4158.84%
Asian2425.16%
Black or African American210.45%
Race
Population ↓
Percentage (of total)
Other race83917.88%
Two or more races1453.09%
White611.3%
Race
Population ↓
Percentage (of total)
White3,10066.06%
Two or more races2705.75%
Asian2425.16%
Black or African American210.45%
Other race150.32%

Lake San Marcos Marital Status

Economics and Income Statistics

Lake San Marcos ' average per capita income is $36,963. Household income levels show a median of $89,851. The poverty rate stands at 5.98%.

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$109,497-
Families$109,432$144,575
Households$89,851$120,348
Non Families$61,250$74,031

$36,963

Average Income

$89,851

Median Household Income

5.98%

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)