Atherton is an incorporated town in San Mateo County, California, United States. Its population was 7,188 as of 2020. The town's zoning regulations permit only one single-family home per acre, and prohibit sidewalks.

The Sequoia Union High School District is a public union school district in the San Francisco Bay Area, primarily serving the southern San Mateo County communities of Atherton, Belmont, East Palo Alto, Ladera, San Carlos, Menlo Park, Portola Valley, Redwood City, and Woodside. The District currently serves more than 9,000 students, and also owns the radio station KCEA.