Some of the cities, towns, and places in Marin County are Alto, Bel Marin Keys, Belvedere, Black Point-Green Point, Bolinas, Corte Madera, Dillon Beach, Dogtown, Fairfax, Forest Knolls, Greenbrae, Ignacio, Inverness, Inverness Park, Kentfield, Lagunitas, Larkspur, Las Gallinas, Lucas Valley-Marinwood, Marin City, Marshall, Mill Valley, Muir Beach, Nicasio, Novato, Olema, Point Reyes Station, Ross, San Anselmo, San Geronimo, San Rafael, Santa Venetia, Sausalito, Sleepy Hollow, Stinson Beach, Strawberry, Tamalpais-Homestead Valley, Tiburon, Tomales, Woodacre
Marin County is located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2010 census, the population was 252,409. Its county seat is San Rafael. Marin County is across the Golden Gate Bridge from San Francisco, and is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area.
As of 2019, Marin County had the sixth highest income per capita of all U.S. counties, at $141,735. The county is governed by the Marin County Board of Supervisors.
San Quentin State Prison is located in the county, as is George Lucas' Skywalker Ranch. Autodesk, the publisher of AutoCAD, is also headquartered there, as well as numerous other high-tech companies. The Marin County Civic Center was designed by Frank Lloyd Wright and draws thousands of visitors a year to guided tours of its arch and atrium design. In 1994, a new county jail facility was embedded into the hillside nearby. Marin County's natural sites include the Muir Woods redwood forest, the Marin Headlands, Stinson Beach, the Point Reyes National Seashore, and Mount Tamalpais.
The United States' oldest cross country running event, the Dipsea Race, takes place annually in Marin County, attracting thousands of athletes. Mountain biking was invented on the slopes of Mount Tamalpais in Marin.