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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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.