Marin County, California
County in California, United States County of Marin County Marin County Civic Center Location in the state of California California's location in the United States Country United States State California Region San Francisco Bay Area Incorporated February 18, 1850 Named for Chief Marin, "great chief of the tribe Licatiut" County seat San Rafael Largest city San Rafael (population) Novato (area) Government • Board of Supervisors Supervisors [1] Damon Connolly Katie Rice Kate Sears Dennis Rodoni Judy Arnold Area • Total 828 sq mi (2,140 km 2 ) • Land 520 sq mi (1,300 km 2 ) • Water 308 sq mi (800 km 2 ) Highest elevation [2] 2,574 ft (785 m) Population (April 1, 2010) [3] • Total 252,409 • Estimate (2016) [4] 260,651 • Density 300/sq mi (120/km 2 ) Time zone UTC−8 (Pacific) • Summer (DST) UTC−7 (PDT) Area codes 415,