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

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