San Mateo is the most populous city in San Mateo County, California,USA, on the San Francisco Peninsula. It is part of the San Francisco Bay Area metropolitan region, and is located about 20 miles south of San Francisco.
San Mateo is the most populous city in San Mateo County, California,USA, on the San Francisco Peninsula. It is part of the San Francisco Bay Area metropolitan region, and is located about 20 miles south of San Francisco.