San Mateo, CaliforniaCityCity of San MateoSealLocation in San Mateo County and the state of CaliforniaSan Mateo, CaliforniaLocation in CaliforniaShow map of CaliforniaShow map of the USShow allCoordinates: 37°33′15″N 122°18′47″WCoordinates: 37°33′15″N 122°18′47″WCountry United StatesState CaliforniaCountySan MateoIncorporatedSeptember 4, 1894[1]Named forSt. MatthewGovernment • MayorDiane Papan[2] • City managerDrew Corbett[3]Area[4] • Total15.88 sq mi (41.14 km2) • Land12.13 sq mi (31.42 km2) • Water3.75 sq mi (9.72 km2) 23.63%Elevation[5]46 ft (14 m)Population (2010)[6] • Total97,207 (US: 292nd) • Estimate (2017)[7]104,748 • Density8,570.40/sq mi (3,309.14/km2)Time zoneUTC−8 (Pacific) • Summer (DST)UTC−7 (PDT)ZIP codes[8]94401–94404, 94497Area code650FIPS code06-68252GNIS feature IDs1659584, 2411800Primary AirportSan Francisco International AirportSFO (Major/International)U.S. RoutesState Routes Commuter Rail (planned)Websitewww.cityofsanmateo.org