San Mateo ( ; Spanish for "Saint Matthew") is a city in San Mateo County, California, United States, in the San Francisco Bay Area. With a population of about 100,000 (97,207 at the 2010 census), it is one of the larger suburbs on the San Francisco Peninsula, located between Burlingame to the north, Foster City to the east, Belmont to the south, and Highlands-Baywood Park and Hillsborough to the west. San Mateo was incorporated in 1864.