San Mateo County population grew by 6.4 percent in last decade

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San Mateo County’s population grew by 6.4 percent over the last 10 years, from 718,451 in 2010 to 764,442 in 2020, according to newly released 2020 Census data.

Below is preliminary population information from the Census, which occurs every decade. The latest Census data was released Aug. 12. The County is further analyzing the information and will update this page soon with more facts.