The Athenian School is a selective college preparatory and boarding school located in Danville, California, United States. Athenian educates students in grades 6–12 on an approximately 75-acre (300,000 m2) campus at the base of Mt. Diablo, located in the San Francisco Bay Area in Northern California. Athenian was founded by Dyke Brown (1915–2006) in 1965. According to Niche, Athenian is ranked 147th on the 2020 list of Best Private High Schools in America and the number one school in Contra Costa County. Athenian is also ranked as the 40th best boarding school in the United States.