In 2020, San Mateo County, CA had a population of 766k people with a median age of 39.8 and a median household income of $128,091. Between 2019 and 2020 the population of San Mateo County, CA declined from 767,423 to 765,623, a −0.235% decrease and its median household income grew from $122,641 to $128,091, a 4.44% increase.
The 5 largest ethnic groups in San Mateo County, CA are White (Non-Hispanic) (38.6%), Asian (Non-Hispanic) (29%), Other (Hispanic) (10.1%), White (Hispanic) (9.76%), and Two+ (Non-Hispanic) (4.25%).
None of the households in San Mateo County, CA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
85.6% of the residents in San Mateo County, CA are U.S. citizens.
In 2020, the median property value in San Mateo County, CA was $1.16M, and the homeownership rate was 59.9%. Most people in San Mateo County, CA drove alone to work, and the average commute time was 29.4 minutes. The average car ownership in San Mateo County, CA was 2 cars per household.