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San Mateo, California Map and Directory


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San Mateo County, California locator map According to the United States Census Bureau, San Mateo is a City that is located in San Mateo County, California at 37.56 degrees North and 122.33 degrees West.  The city's time zone is America/Los Angeles, and the city's primary telephone area code is 650.  The land area of San Mateo is about 12.13 square miles, whereas the water area of the city is about 3.75 square miles.  San Mateo County's land area is about 448 square miles, so the city occupies about 2.7 percent of the county's total land area.

The Census Bureau estimates that San Mateo had about 104,748 residents in 2017, which is approximately 8,635 people per square mile of land area. 

According to recent American Community Survey data, San Mateo had 38,011 total estimated households and the median household income was about $90,087 per year. 

The California counties map at upper right shows San Mateo County, highlighted in red.  Use the menu below to display interactive maps of San Mateo, either in a frame on this page or in full-screen mode. 

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