San Marcos Flag

San Marcos

County Seat:
No
Area (mi²):
24.571
State:
California

San Marcos is a city located in San Diego County, California. San Marcos has a 2025 population of 97,040 . San Marcos is currently growing at a rate of 0.43% annually and its population has increased by 2.21% since the most recent census, which recorded a population of 94,938 in 2020.

The average household income in San Marcos is $131,847 with a poverty rate of 10.17%. The median age in San Marcos is 36.8 years: 35.6 years for males, and 37.7 years for females. For every 100 females there are 98.5 males.

97K
Total Population
3,949
Density (mi²)
420 0.43%
Growth

San Marcos Population

San Marcos Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of San Marcos includes 55.11% White, 12.36% other race, 10.89% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White (55.11%)

Two or more races (19.28%)

Other race (12.36%)

Asian (10.89%)

Black or African American (1.48%)

Native American (0.8%)

Native Hawaiian or Pacific Islander (0.09%)

Race
Population
Percentage (of total)
White51,84455.11%
Two or more races18,13719.28%
Other race11,62812.36%
Asian10,24110.89%
Black or African American1,3911.48%
Native American7540.8%
Native Hawaiian or Pacific Islander830.09%

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

San Marcos' average per capita income is $59,450. Household income levels show a median of $105,286. The poverty rate stands at 10.17%.

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$144,636$167,453
Families$124,686$148,661
Households$105,286$131,847
Non Families$55,633$74,755

$59,450

Average Income

$105,286

Median Household Income

10.17%

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)