San Ardo, formerly known as San Bernardo, is an unincorporated community and census-designated place (CDP) in Monterey County, California, United States. San Ardo is located 18 miles (29 km) southeast of King City at an elevation of 449 feet (137 m). The population was 392 at the 2020 census, down from 517 in 2010.

Monterey County, officially the County of Monterey, is a county located on the Pacific coast in the U.S. state of California. As of the 2020 census, its population was 439,035. The county's largest city and county seat is Salinas.