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 2026 population of 97,461. San Marcos is currently growing at a rate of 0.43% annually and its population has increased by 2.66% since the most recent census, which recorded a population of 94,938 in 2020.

The median household income in San Marcos is $109,377 with a poverty rate of 9.2%. The median age in San Marcos is 36.8 years: 35.9 years for males, and 37.4 years for females. For every 100 females there are 95.6 males.

97.5K
Total Population
3,966
Density (mi²)
421 0.43%
Growth

San Marcos Population

San Marcos Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202697,4614210.43%
202597,0404200.43%
202496,6201,4251.5%
202395,1959671.03%
202294,2288560.92%
202193,372-1,496-1.58%
202094,938-2,452-2.52%
201997,3909921.03%
201896,3981,2411.3%
201795,1576070.64%
201694,5508880.95%
201593,6621,7371.89%
201491,9252,4382.72%
201389,4872,7113.12%
201286,7761,5871.86%
201185,1891,2411.48%
201083,9481670.2%
200054,97716,00341.06%
199038,97421,495122.98%
198017,47913,583348.64%
19703,8961,39655.84%
19602,50000%

Median Age

Overall: 36.8 years
Female: 37.4 years
Male: 35.9 years

San Marcos Adults

There are 70,963 adults, (12,506 of whom are seniors) in San Marcos.

Sex Ratio

Female: 48,496 (51.1%)
Male: 46,386 (48.9%)

Demographics

The racial composition of San Marcos includes 50.61% White, 13.62% other race, 11.76% 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)
White48,02450.61%
Two or more races20,31021.41%
Other race12,92513.62%
Asian11,15711.76%
Black or African American1,2651.33%
Native American1,0211.08%
Native Hawaiian or Pacific Islander1800.19%
Race
Population ↓
Percentage (of total)
Two or more races14,71915.51%
Other race12,50513.18%
White6,4286.77%
Native American8960.94%
Black or African American1320.14%
Asian1020.11%
Native Hawaiian or Pacific Islander910.1%
Race
Population ↓
Percentage (of total)
White41,59643.84%
Asian11,05511.65%
Two or more races5,5915.89%
Black or African American1,1331.19%
Other race4200.44%
Native American1250.13%
Native Hawaiian or Pacific Islander890.09%

San Marcos Marital Status

Economics and Income Statistics

San Marcos ' average per capita income is $61,253. Household income levels show a median of $109,377. The poverty rate stands at 9.2%.

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$150,691-
Families$129,931$160,191
Households$109,377$141,381
Non Families$60,833$77,799

$61,253

Average Income

$109,377

Median Household Income

9.2%

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)