San Mateo demographics profile

StatisticSan MateoCaliforniaNational
Population density (sq mi)8,42823291
Median age38.936.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)56%52%55%
Families w/ Kids under 1845%46%43%
Speak English55%56%79%
Speak Spanish22%29%13%
San Mateo, CA has a population of 102,224 and is the 303rd largest city in the United States. The population density is 8,428 per sq mi which is 3526% higher than the California average and 9202% higher than the national average. The median age in San Mateo is 39 which is approximately 8% higher than the California average of 36. In San Mateo, 56% of the population over 15 years of age are married, 55% speak English and 22% speak Spanish. 48% of San Mateo residents were born in California, 16% were born out of state, 2% were born outside of the United States and 34% were foreign born.

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Did you know?

  • The population density in San Mateo is 3526% higher than California.
  • The median age in San Mateo is 8% higher than California.
  • In San Mateo 60.32% of the population is White.
  • In San Mateo 2.12% of the population is Black or African American.
  • In San Mateo 20.98% of the population is Asian.

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San Mateo population breakdown by race

RaceSan MateoCaliforniaNational
Black or African American2.12%5.85%12.63%
American Indian0.34%0.74%0.82%
Native Hawaiian1.63%0.39%0.18%
Mixed race5.63%4.62%3.06%
Other race8.98%13.28%4.75%
In San Mateo, 26.8% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

San Mateo age breakdown

Marital status

Age of children in married couples

Source: The San Mateo, CA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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