San Marcos

County:: San Diego County
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 93,747. San Marcos is currently declining at a rate of -0.23% annually and its population has decreased by -1.16% since the most recent census, which recorded a population of 94,849 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.

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

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	51,844	55.11%
Two or more races	18,137	19.28%
Other race	11,628	12.36%
Asian	10,241	10.89%
Black or African American	1,391	1.48%
Native American	754	0.8%
Native Hawaiian or Pacific Islander	83	0.09%

San Marcos Marital Status

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