Ben Lomond is a census-designated place (CDP) in Santa Cruz County, California, United States, and also the name of the mountain to the west. The population was 6,234 at the 2010 census. Ben Lomond is located on State Highway 9, about 12 miles from Santa Cruz, California and 34 miles from San Jose, California (the nearest major city) at 37°5′24″N 122°5′24″W (37.09, -122.09). According to the United States Census Bureau, the CDP has a total area of 8.4 square miles (22 km2). The San Lorenzo River runs through it, in what is known locally as the San Lorenzo Valley, which runs SE/NW to the east of Ben Lomond Mountain (really a long ridge whose highest point has an elevation of 810m/2660 ft).