High Quality Content by WIKIPEDIA articles! Stinson Beach is a census-designated place in Marin County, California, on the west coast of the United States. Stinson Beach is located 2.5 miles (4 km) east-southeast of Bolinas, at an elevation of 26 feet (8 m). The population of the Stinson Beach CDP (census-designated place) was 632 at the 2010 census.