Westlake High School (also known as Westlake High, Westlake, or WHS) is a public high school in the Westlake neighborhood of Thousand Oaks, in Ventura County, California. Westlake High School serves grades 9–12 in the Conejo Valley Unified School District. Middle schools that feed into Westlake include Colina Middle School and Los Cerritos Middle School.