Marin County's population is about 261,000. Marin County has the fifth highest income per capita in the United States. Median household income is currently $103,845. The median home value is $1,157,800. The county seat is San Rafael. It is home to San Quentin Prison and many high-tech companies.
Marin County is part of the San Francisco Bay Area, and it sits just north of the city across the Golden Gate Strait. It is located on a large, south-facing peninsula and contains Muir Woods redwood forest, the Marin Headlands, Stinson Beach, Pt. Reyes National Seashore, and Mt. Tamelpais.
Marin County is one of the original 27 counties of California, created February 18, 1850, following adoption of the California Constitutionof 1849 and just months before the state was admitted to the Union. The Marin County Civic Center was designed by Frank Lloyd Wright and is a tourist attraction.