Marin County is a county located in the North San Francisco Bay Area of the State of California, across the Golden Gate Bridge from San Francisco County. As of 2010, its population was about 252,400. Its county seat is San Rafael and its largest employer is the county government. Marin County is well known for its natural beauty, liberal politics, and affluence. In May 2009, Marin County had the fifth highest income per capita in the United States at about $91,480.
