The County of San Mateo was established on April 19,1856 and is one of California’s 58 counties. The County consists of455 square miles of land.San Mateo County is home to some of the most spectacular andvaried geography in the United States. It stretches from the PacificOcean to San Francisco Bay and includes redwood forests, rollinghills, farmland, tidal marshes, creeks and beaches. The County is known for its mild climate and scenic vistas.As a subdivisions of the state, the county provides a vast array of services for all residents. These include social services, public health protection, housing programs, property tax assessments, tax collection, elections and public safety. The County also providesbasic city-style services for residents who do not live within a city but in an unincorporated area.